Citizen science (CS; also known as community science, crowd science, crowd-sourced science, civic science, volunteer monitoring, or online citizen science) is scientific research conducted, in whole or in part, by amateur (or nonprofessional) scientists. Citizen science is sometimes described as "public participation in scientific research," participatory monitoring, and participatory action research whose outcomes are often advancements in scientific research, as well as an increase in the public's understanding of science. Based on Alexa rankings iNaturalist is currently the most popular citizen science website followed by eBird and then Zooniverse in second and third place respectively.
- 1 Definition
- 2 Ethics
- 3 History
- 4 Modern technology
- 5 Africa, Asia and South America
- 6 Conferences
- 7 National and regional portals
- 8 See also
- 9 References
- 10 Further reading
- 11 External links
The term CS has multiple origins, as well as differing concepts. It was first defined independently in the mid-1990s by Rick Bonney in the United States and Alan Irwin in the United Kingdom. Alan Irwin, a British sociologist, defines CS as "developing concepts of scientific citizenship which foregrounds the necessity of opening up science and science policy processes to the public". Irwin sought to reclaim two dimensions of the relationship between citizens and science: 1) that science should be responsive to citizens' concerns and needs; and 2) that citizens themselves could produce reliable scientific knowledge. The American ornithologist Rick Bonney, unaware of Irwin's work, defined CS as projects in which nonscientists, such as amateur birdwatchers, voluntarily contributed scientific data. This describes a more limited role for citizens in scientific research than Irwin's conception of the term.
The terms citizen science and citizen scientists entered the Oxford English Dictionary (OED) in June 2014. "Citizen science" is defined as "scientific work undertaken by members of the general public, often in collaboration with or under the direction of professional scientists and scientific institutions". "Citizen scientist" is defined as: (a) "a scientist whose work is characterized by a sense of responsibility to serve the best interests of the wider community (now rare)"; or (b) "a member of the general public who engages in scientific work, often in collaboration with or under the direction of professional scientists and scientific institutions; an amateur scientist". The first use of the term "citizen scientist" can be found in the magazine New Scientist in an article about ufology from October 1979.
Muki Haklay cites, from a policy report for the Wilson Center entitled "Citizen Science and Policy: A European Perspective", an alternate first use of the term "citizen science" by R. Kerson in the magazine MIT Technology Review from January 1989. Quoting from the Wilson Center report: "The new form of engagement in science received the name 'citizen science'. The first recorded example of the use of the term is from 1989, describing how 225 volunteers across the US collected rain samples to assist the Audubon Society in an acid-rain awareness raising campaign."
A "Green Paper on Citizen Science" was published in 2013 by the European Commission's Digital Science Unit and Socientize.eu, which included a definition for CS, referring to "the general public engagement in scientific research activities when citizens actively contribute to science either with their intellectual effort or surrounding knowledge or with their tools and resources. Participants provide experimental data and facilities for researchers, raise new questions and co-create a new scientific culture."
Citizen science may be performed by individuals, teams, or networks of volunteers. Citizen scientists often partner with professional scientists to achieve common goals. Large volunteer networks often allow scientists to accomplish tasks that would be too expensive or time consuming to accomplish through other means.
Citizen science has evolved over the past four decades. Recent projects place more emphasis on scientifically sound practices and measurable goals for public education. Modern citizen science differs from its historical forms primarily in the access for, and subsequent scale of, public participation; technology is credited as one of the main drivers of the recent explosion of citizen science activity.
In March 2015, the Office of Science and Technology Policy published a factsheet entitled "Empowering Students and Others through Citizen Science and Crowdsourcing". Quoting: "Citizen science and crowdsourcing projects are powerful tools for providing students with skills needed to excel in science, technology, engineering, and math (STEM). Volunteers in citizen science, for example, gain hands-on experience doing real science, and in many cases take that learning outside of the traditional classroom setting".
In May 2016, a new open-access journal was started by the Citizen Science Association along with Ubiquity Press called Citizen Science: Theory and Practice (CS:T&P). Quoting from the editorial article titled "The Theory and Practice of Citizen Science: Launching a New Journal", "CS:T&P provides the space to enhance the quality and impact of citizen science efforts by deeply exploring the citizen science concept in all its forms and across disciplines. By examining, critiquing, and sharing findings across a variety of citizen science endeavors, we can dig into the underpinnings and assumptions of citizen science and critically analyze its practice and outcomes."
- The participation of nonscientists in the process of gathering data according to specific scientific protocols and in the process of using and interpreting that data.
- The engagement of nonscientists in true decision-making about policy issues that have technical or scientific components.
- The engagement of research scientists in the democratic and policy process.
Scientists and scholars who have used other definitions include Frank N. von Hippel, Stephen Schneider, Neal Lane and Jon Beckwith. Other alternative terminologies proposed are "civic science" and "civic scientist".
Further, Muki Haklay offers an overview of the typologies of the level of citizen participation in citizen science, which range from "crowdsourcing" (level 1), where the citizen acts as a sensor, to "distributed intelligence" (level 2), where the citizen acts as a basic interpreter, to "participatory science", where citizens contribute to problem definition and data collection (level 3), to "extreme citizen science", which involves collaboration between the citizen and scientists in problem definition, collection and data analysis.
In 2016 the Australian Citizen Science Association released their definition which states "Citizen science involves public participation and collaboration in scientific research with the aim to increase scientific knowledge."
In 2016, the book "Analyzing the Role of Citizen Science in Modern Research" defined citizen science as "work undertaken by civic educators together with citizen communities to advance science, foster a broad scientific mentality, and/or encourage democratic engagement, which allows society to deal rationally with complex modern problems".
In a Smart City era, Citizen Science relays on various web-based tools (eg.WebGIS) and becomes Cyber Citizen Science. Some projects, such as SETI@home, use the Internet to take advantage of distributed computing. These projects are generally passive. Computation tasks are performed by volunteers' computers and require little involvement beyond initial setup. There is disagreement as to whether these projects should be classified as citizen science.
The astrophysicist and Galaxy Zoo co-founder Kevin Schawinski stated: "We prefer to call this [Galaxy Zoo] citizen science because it's a better description of what you're doing; you're a regular citizen but you're doing science. Crowd sourcing sounds a bit like, well, you're just a member of the crowd and you're not; you're our collaborator. You're pro-actively involved in the process of science by participating."
Compared to SETI@home, "Galaxy Zoo volunteers do real work. They're not just passively running something on their computer and hoping that they'll be the first person to find aliens. They have a stake in science that comes out of it, which means that they are now interested in what we do with it, and what we find."
Citizen policy may be another result of citizen science initiatives. Bethany Brookshire (pen name SciCurious) writes: "If citizens are going to live with the benefits or potential consequences of science (as the vast majority of them will), it's incredibly important to make sure that they are not only well informed about changes and advances in science and technology, but that they also ... are able to ... influence the science policy decisions that could impact their lives."
Benefits and limitations
Citizen involvement in scientific projects has become a means of encouraging curiosity and greater understanding of science whilst providing an unprecedented engagement between professional scientists and the general public. In a research report published by the National Park Service in 2008, Brett Amy Thelen and Rachel K. Thiet mention the following concerns, previously reported in the literature, about the validity of volunteer-generated data:
- Some projects may not be suitable for volunteers, for instance, when they use complex research methods or require a lot of (often repetitive) work.
- If volunteers lack proper training in research and monitoring protocols, they are at risk of introducing bias into the data.
- Members may lie about data. This risk is even greater when bounties are awarded as an incentive to participate.
The question of data accuracy, in particular, remains open. John Losey, who created the Lost Ladybug citizen science project, has argued that the cost-effectiveness of citizen science data can outweigh data quality issues, if properly managed.
In December 2016, authors M. Kosmala, A. Wiggins, A. Swanson and B. Simmons published a study in the journal Frontiers in Ecology and the Environment called "Assessing Data Quality in Citizen Science". The abstract describes how ecological and environmental CS projects have enormous potential to advance science. Also, CS projects can influence policy and guide resource management by producing datasets that are otherwise infeasible to generate. In the section "In a Nutshell" (pg3), four condensed conclusions are stated. They are:
- Datasets produced by volunteer CSs can have reliably high quality, on par with those produced by professionals.
- Individual volunteer accuracy varies, depending on task difficulty and volunteer experience. Multiple methods exist for boosting accuracy to required levels for a given project.
- Most types of bias found in CS datasets are also found in professionally produced datasets and can be accommodated using existing statistical tools.
- Reviewers of CS projects should look for iterated project design, standardization and appropriateness of volunteer protocols and data analyses, capture of metadata, and accuracy assessment.
They conclude that as CS continues to grow and mature, a key metric of project success they expect to see will be a growing awareness of data quality. They also conclude that CS will emerge as a general tool helping "to collect otherwise unobtainable high-quality data in support of policy and resource management, conservation monitoring, and basic science."
A study of Canadian lepidoptera datasets published in 2018 compared the use of a professionally curated dataset of butterfly specimen records with four years of data from a CS program, eButterfly. The eButterfly dataset was used as it was determined to be of high quality because of the expert vetting process used on the site, and there existed a historic dataset covering the same geographic area consisting of specimen data, much of it institutional. The authors note that, in this case, CS data provides both novel and complementary information to the specimen data. Five new species were reported from the CS data, and geographic distribution information was improved for over 80% of species in the combined dataset when CS data was included.
In March 2015, the state of Wyoming passed new laws (Senate Files 12 and 80) clarifying that trespassing laws applied even if the trespasser's intention was to gather data to further a U.S. government science program. This hampered some CS researchers who were collecting data while on other people's land.
Various studies have been published that explore the ethics of CS, including issues such as intellectual property and project design.(e.g.) The Citizen Science Association (CSA), based at the Cornell Lab of Ornithology, and the European Citizen Science Association (ECSA), based in the Museum für Naturkunde in Berlin, have working groups on ethics and principles.
In September 2015, the European Citizen Science Association (ECSA) published its Ten Principles of Citizen Science, which have been developed by the "Sharing best practice and building capacity" working group of the ECSA, led by the Natural History Museum, London with input from many members of the association.
- Citizen science projects actively involve citizens in scientific endeavour that generates new knowledge or understanding. Citizens may act as contributors, collaborators, or as project leader and have a meaningful role in the project.
- Citizen science projects have a genuine science outcome. For example, answering a research question or informing conservation action, management decisions or environmental policy.
- Both the professional scientists and the citizen scientists benefit from taking part. Benefits may include the publication of research outputs, learning opportunities, personal enjoyment, social benefits, satisfaction through contributing to scientific evidence e.g. to address local, national and international issues, and through that, the potential to influence policy.
- Citizen scientists may, if they wish, participate in multiple stages of the scientific process. This may include developing the research question, designing the method, gathering and analysing data, and communicating the results.
- Citizen scientists receive feedback from the project. For example, how their data are being used and what the research, policy or societal outcomes are.
- Citizen science is considered a research approach like any other, with limitations and biases that should be considered and controlled for. However unlike traditional research approaches, citizen science provides opportunity for greater public engagement and democratisation of science.
- Citizen science project data and meta-data are made publicly available and where possible, results are published in an open access format. Data sharing may occur during or after the project, unless there are security or privacy concerns that prevent this.
- Citizen scientists are acknowledged in project results and publications.
- Citizen science programmes are evaluated for their scientific output, data quality, participant experience and wider societal or policy impact.
- The leaders of citizen science projects take into consideration legal and ethical issues surrounding copyright, intellectual property, data sharing agreements, confidentiality, attribution, and the environmental impact of any activities.
The medical ethics of internet crowdsourcing has been questioned by Graber & Graber in the Journal of Medical Ethics. In particular, they analyse the effect of games and the crowdsourcing project Foldit. They conclude: "games can have possible adverse effects, and that they manipulate the user into participation".
In March 2019 the online journal Citizen Science: Theory and Practice launched a collection of articles on the theme of Ethical Issues in Citizen Science. The articles are introduced with (quoting): "Citizen science can challenge existing ethical norms because it falls outside of customary methods of ensuring that research is conducted ethically. What ethical issues arise when engaging the public in research? How have these issues been addressed, and how should they be addressed in the future?"
In June 2019, East Asian Science, Technology and Society: An International Journal (EASTS) published an issue titled "Citizen Science: Practices and Problems" which contains 15 articles/studies on CS, including many relevant subjects of which ethics is one. Quoting from the introduction Citizen, Science, and Citizen Science: "The term citizen science has become very popular among scholars as well as the general public, and, given its growing presence in East Asia, it is perhaps not a moment too soon to have a special issue of EASTS on the topic."
In the research paper "Can citizen science enhance public understanding of science?" by Bonney et al. 2016, statistics which analyse the economic worth of citizen science are used, drawn from two papers: i)Sauermann and Franzoni 2015, and ii)Theobald et al. 2015. In "Crowd science user contribution patterns and their implications" by Sauermann and Franzoni (2015), seven projects from the Zooniverse web portal are used to estimate the monetary value of the CS that had taken place. The 7 projects are: Solar Stormwatch, Galaxy Zoo Supernovae, Galaxy Zoo Hubble, Moon Zoo, Old Weather, The Milky Way Project and Planet Hunters. Using data from 180 days in 2010, they find a total of 100,386 users participated, contributing 129,540 hours of unpaid work. Estimating at a rate of $12 an hour (an undergraduate research assistant's basic wage), the total contributions amount to $1,554,474, an average of $222,068 per project. The range over the 7 projects was from $22,717 to $654,130.
In "Global change and local solutions: Tapping the unrealized potential of citizen science for biodiversity research" by Theobald et al. 2015, the authors surveyed 388 unique biodiversity-based projects. Quoting: "We estimate that between 1.36 million and 2.28 million people volunteer annually in the 388 projects we surveyed, though variation is great" and that "the range of in-kind contribution of the volunteerism in our 388 citizen science projects as between $667 million to $2.5 billion annually."
Worldwide participation in citizen science continues to grow. A list of the top five citizen science communities compiled by Marc Kuchner and Kristen Erickson in July 2018 shows a total of 3.75 million participants, although there is likely substantial overlap between the communities.
There have been studies published which examine the place of CS within education.(e.g.) Teaching aids can include books and activity or lesson plans.(e.g.). Some examples of studies are:
From the Second International Handbook of Science Education, a chapter entitled: "Citizen Science, Ecojustice, and Science Education: Rethinking an Education from Nowhere" by Mueller and Tippins (2011), acknowledges in the abstract that: "There is an emerging emphasis in science education on engaging youth in citizen science." The authors also ask: "whether citizen science goes further with respect to citizen development." The abstract ends by stating that the "chapter takes account of the ways educators will collaborate with members of the community to effectively guide decisions, which offers promise for sharing a responsibility for democratizing science with others."
From the journal Democracy and Education, an article entitled: "Lessons Learned from Citizen Science in the Classroom" by authors Gray, Nicosia and Jordan (GNJ) (2012) give a response to a study by Mueller, Tippins and Bryan (MTB) called "The Future of Citizen Science". GNJ begins by stating in the abstract that the study The Future of Citizen Science: "provides an important theoretical perspective about the future of democratized science and K12 education." But GRB state: "However, the authors (MTB) fail to adequately address the existing barriers and constraints to moving community-based science into the classroom." They end the abstract by arguing: "that the resource constraints of scientists, teachers, and students likely pose problems to moving true democratized science into the classroom."
In 2014, a study was published called "Citizen Science and Lifelong Learning" by R. Edwards in the journal Studies in the Education of Adults. Edwards begins by writing in the abstract that CS projects have expanded over recent years and engaged CSs and professionals in diverse ways. He continues: "Yet there has been little educational exploration of such projects to date." He describes that "there has been limited exploration of the educational backgrounds of adult contributors to citizen science". Edwards explains that CS contributors are referred to as volunteers, citizens or as amateurs. He ends the abstract: "The article will explore the nature and significance of these different characterisations and also suggest possibilities for further research."
In the journal Microbiology and Biology Education a study was published by Shah and Martinez (2015) called "Current Approaches in Implementing Citizen Science in the Classroom". They begin by writing in the abstract that CS is a partnership between inexperienced amateurs and trained scientists. The authors continue: "With recent studies showing a weakening in scientific competency of American students, incorporating citizen science initiatives in the curriculum provides a means to address deficiencies". They argue that combining traditional and innovative methods can help provide a practical experience of science. The abstract ends: "Citizen science can be used to emphasize the recognition and use of systematic approaches to solve problems affecting the community."
In November 2017, authors Mitchell, Triska and Liberatore published a study in PLOS ONE titled "Benefits and Challenges of Incorporating Citizen Science into University Education". The authors begin by stating in the abstract that CSs contribute data with the expectation that it will be used. It reports that CS has been used for first year university students as a means to experience research. They continue: "Surveys of more than 1500 students showed that their environmental engagement increased significantly after participating in data collection and data analysis." However, only a third of students agreed that data collected by CSs was reliable. A positive outcome of this was that the students were more careful of their own research. The abstract ends: "If true for citizen scientists in general, enabling participants as well as scientists to analyse data could enhance data quality, and so address a key constraint of broad-scale citizen science programs."
"Citizen science" is a fairly new term but an old practice. Prior to the 20th century, science was often the pursuit of gentleman scientists, amateur or self-funded researchers such as Sir Isaac Newton, Benjamin Franklin, and Charles Darwin. By the mid-20th century, however, science was dominated by researchers employed by universities and government research laboratories. By the 1970s, this transformation was being called into question. Philosopher Paul Feyerabend called for a "democratization of science". Biochemist Erwin Chargaff advocated a return to science by nature-loving amateurs in the tradition of Descartes, Newton, Leibniz, Buffon, and Darwin—science dominated by "amateurship instead of money-biased technical bureaucrats".
A study from 2016 indicates that the largest impact of citizen science is in research on biology, conservation and ecology, and is utilized mainly as a methodology of collecting and classifying data.
Collectively, amateur astronomers observe a variety of celestial objects and phenomena sometimes with equipment that they build themselves. Common targets of amateur astronomers include the Moon, planets, stars, comets, meteor showers, and a variety of deep-sky objects such as star clusters, galaxies, and nebulae. Observations of comets and stars are also used to measure the local level of artificial skyglow. One branch of amateur astronomy, amateur astrophotography, involves the taking of photos of the night sky. Many amateurs like to specialize in the observation of particular objects, types of objects, or types of events that interest them.
The American Association of Variable Star Observers has gathered data on variable stars for educational and professional analysis since 1911 and promotes participation beyond its membership on its Citizen Sky website.
Butterfly counts have a long tradition of involving individuals in the study of butterflies' range and their relative abundance. Two long-running programs are the UK Butterfly Monitoring Scheme (started in 1976) and the North American Butterfly Association's Butterfly Count Program (started in 1975). There are various protocols for monitoring butterflies and different organizations support one or more of transects, counts and/or opportunistic sightings. eButterfly is an example of a program designed to capture any of the three types of counts for observers in North America. Species-specific programs also exist, with monarchs the prominent example. Two examples of this involve the counting of monarch butterflies during the fall migration to overwintering sites in Mexico: (1) Monarch Watch is a continent-wide project, while (2) the Cape May Monarch Monitoring Project is an example of a local project. The Austrian project Viel-Falter investigated if and how trained and supervised pupils are able to systematically collect data about the occurrence of diurnal butterflies, and how this data could contribute to a permanent butterfly monitoring system. Despite substantial identification uncertainties for some species or species groups, the data collected by pupils was successfully used to predict the general habitat quality for butterflies.
Citizen science projects have become increasingly focused on providing benefits to scientific research. The North American Bird Phenology Program (historically called the Bird Migration and Distribution records) may have been the earliest collective effort of citizens collecting ornithological information in the U.S. The program, dating back to 1883, was started by Wells Woodbridge Cooke. Cooke established a network of observers around North America to collect bird migration records. The Audubon Society's Christmas Bird Count, which began in 1900, is another example of a long-standing tradition of citizen science which has persisted to the present day. Citizen scientists help gather data that will be analyzed by professional researchers, and can be used to produce bird population and biodiversity indicators.
Raptor migration research relies on the data collected by the hawkwatching community. This mostly volunteer group counts migrating accipiters, buteos, falcons, harriers, kites, eagles, osprey, vultures and other raptors at hawk sites throughout North America during the spring and fall seasons. The daily data is uploaded to hawkcount.org where it can be viewed by professional scientists and the public.
Such indices can be useful tools to inform management, resource allocation, policy and planning. For example, European breeding bird survey data provide input for the Farmland Bird Index, adopted by the European Union as a structural indicator of sustainable development. This provides a cost-effective alternative to government monitoring.
Similarly, data collected by citizen scientists as part of BirdLife Australia's has been analysed to produce the first-ever Australian Terrestrial Bird Indices.
The concept of citizen science has been extended to the ocean environment for characterizing ocean dynamics and tracking marine debris. For example, the mobile app Marine Debris Tracker is a joint partnership of National Oceanic and Atmospheric Administration and the University of Georgia. Long term sampling efforts such as the continuous plankton recorder has been fitted on ships of opportunity since 1931. Plankton collection by sailors and subsequent genetic analysis was pioneered in 2013 by Indigo V Expeditions as a way to better understand marine microbial structure and function.
Citizen science in Coral reef studies developed in the 21st century.
Underwater photography has become more popular since the early 2000s, resulting on millions of pictures posted every year on various websites and social media. This mass of documentation has great scientific potential, as millions of tourists possess a much superior coverage power than professional scientists, who cannot spend so much time in the field.
As a consequence, several participative sciences programs have been developed, supported by geotagging and identification web sites (such as iNaturalist.org). The Monitoring through many eyes project collates thousands of underwater images of the Great Barrier Reef and provides an interface for elicitation of reef health indicators.
The National Oceanic and Atmospheric Administration (NOAA) also offers opportunities for volunteer participation. By taking measurements in The United States' National Marine Sanctuaries, citizens contribute data to marine biology projects. In 2016, NOAA benefited from 137,000 hours of research.
There also exist protocols for auto-organization and self-teaching aimed at biodiversity-interested snorkelers, in order for them to turn their observations into sound scientific data, available for research. This kind of approach has been successfully used in Réunion island, allowing for tens of new records and even new species.
Farmer participation in experiments has a long tradition in Agricultural science. There are many opportunities for citizen engagement in different parts of food systems. Citizen science is actively used for crop variety selection for climate adaptation, involving thousands of farmers.
Citizen science has a long tradition in Natural science. But nowadays, citizen science projects can also be found in various fields of science like Art history. For example, the Zooniverse project AnnoTate is a transcription tool developed to enable volunteers to read and transcribe the personal papers of British-born and émigré artists. The papers are drawn from the Tate Archive. Another example of citizen science in art history is ARTigo. ARTigo collects semantic data on artworks from the footprints left by players of games featuring artwork images. From these footprints, ARTigo automatically builds a semantic search engine for artworks.
Newer technologies have increased the options for citizen science. Citizen scientists can build and operate their own instruments to gather data for their own experiments or as part of a larger project. Examples include amateur radio, amateur astronomy, Six Sigma Projects, and Maker activities. Scientist Joshua Pearce has advocated for the creation of open-source hardware based scientific equipment that both citizen scientists and professional scientists, which can be replicated by digital manufacturing techniques such as 3D printing. Multiple studies have shown this approach radically reduces scientific equipment costs. Examples of this approach include water testing, nitrate and other environmental testing, basic biology and optics. Groups such as Public Lab, which is a community where citizen scientists can learn how to investigate environmental concerns using inexpensive DIY techniques, embody this approach.
Video technology is much used in scientific research. The Citizen Science Center in the Nature Research Center wing of the North Carolina Museum of Natural Sciences has exhibits on how to get involved in scientific research and become a citizen scientist. For example, visitors can observe birdfeeders at the Prairie Ridge Ecostation satellite facility via live video feed and record which species they see.
Since 2005, the Genographic Project has used the latest genetic technology to expand our knowledge of the human story, and its pioneering use of DNA testing to engage and involve the public in the research effort has helped to create a new breed of "citizen scientist". Geno 2.0 expands the scope for citizen science, harnessing the power of the crowd to discover new details of human population history. This includes supporting, organization and dissemination of personal DNA (genetic) testing. Like Amateur astronomy, citizen scientists encouraged by volunteer organizations like the International Society of Genetic Genealogy have provided valuable information and research to the professional scientific community.
Citizens in Space (CIS), a project of the United States Rocket Academy, seeks to combine citizen science with citizen space exploration. CIS is training citizen astronauts to fly as payload operators on suborbital reusable spacecraft that are now in development. CIS will also be developing, and encouraging others to develop, citizen-science payloads to fly on suborbital vehicles. CIS has already acquired a contract for 10 flights on the Lynx suborbital vehicle, being developed by XCOR Aerospace, and plans to acquire additional flights on XCOR Lynx and other suborbital vehicles in the future.
CIS believes that "The development of low-cost reusable suborbital spacecraft will be the next great enabler, allowing citizens to participate in space exploration and space science."
The Internet has been a boon to citizen science, particularly through gamification. One of the first Internet-based citizen science experiments was NASA's Clickworkers, which enabled the general public to assist in the classification of images, greatly reducing the time to analyze large data sets. Another was the Citizen Science Toolbox, launched in 2003, of the Australian Coastal Collaborative Research Centre. Mozak is a game in which players create 3D reconstructions from images of actual human and mouse neurons, helping to advance understanding of the brain. One of the largest citizen science games is Eyewire, a brain-mapping puzzle game developed at the Massachusetts Institute of Technology that now has over 200,000 players. Another example is Quantum Moves, a game developed by the Center for Driven Community Research at Aarhus University, which uses online community efforts to solve quantum physics problems. The solutions found by players can then be used in the lab to feed computational algorithms used in building a scalable quantum computer.
More generally, Amazon's Mechanical Turk is frequently used in the creation, collection, and processing of data by paid citizens. There is controversy as to whether or not the data collected through such services is reliable, as it is subject to participants' desire for compensation. However, use of Mechanical Turk tends to quickly produce more diverse participant backgrounds, as well as comparably accurate data when compared to traditional collection methods.
The internet has also enabled citizen scientists to gather data to be analyzed by professional researchers. Citizen science networks are often involved in the observation of cyclic events of nature (phenology), such as effects of global warming on plant and animal life in different geographic areas, and in monitoring programs for natural-resource management. On BugGuide.Net, an online community of naturalists who share observations of arthropod, amateurs and professional researchers contribute to the analysis. By October 2014, BugGuide has over 808,718 images submitted by more than 27,846 contributors.
Not counting iNaturalist and eBird, the Zooniverse is home to the internet's largest, most popular and most successful citizen science projects. The Zooniverse and the suite of projects it contains is produced, maintained and developed by the Citizen Science Alliance (CSA). The member institutions of the CSA work with many academic and other partners around the world to produce projects that use the efforts and ability of volunteers to help scientists and researchers deal with the flood of data that confronts them. On 29 June 2015, the Zooniverse released a new software version with a project-building tool allowing any registered user to create a project. Project owners may optionally complete an approval process to have their projects listed on the Zooniverse site and promoted to the Zooniverse community. A NASA/JPL picture to the right gives an example from one of Zooniverse's projects The Milky Way Project.
The website CosmoQuest has as its goal "To create a community of people bent on together advancing our understanding of the universe; a community of people who are participating in doing science, who can explain why what they do matters, and what questions they are helping to answer.
CrowdCrafting enables its participants to create and run projects where volunteers help with image classification, transcription, geocoding and more. The platform is powered by PyBossa software, a free and open-source framework for crowdsourcing.
Project Soothe is a citizen science research project based at the University of Edinburgh. The aim of this research is to create a bank of soothing images, submitted by members of the public, which can be used to help others through psychotherapy and research in the future. Since 2015, Project Soothe has received over 600 soothing photographs from people in 23 countries. Anyone aged 12 years or over are eligible to participate in this research in two ways: (1) By submitting soothing photos that they have taken with a description of why the images make them feel soothed (2) By rating the photos that have been submitted by people worldwide for their soothability. 
The bandwidth and ubiquity afforded by smartphones has vastly expanded the opportunities for citizen science. Examples include iNaturalist, the San Francisco project, the WildLab, Project Noah, and Aurorasurus. Due to their ubiquity, for example, Twitter, Facebook, and smartphones have been useful for citizen scientists, having enabled them to discover and propagate a new type of aurora dubbed "STEVE" in 2016.
An Android app Sapelli is a mobile data-collection and -sharing platform designed with a particular focus on non-literate and illiterate users. The SPOTTERON app creates synergy effects for projects by sharing a common feature set.
"The Crowd and the Cloud" is a four-part series broadcast during April 2017, which examines citizen science. It shows how smartphones, computers and mobile technology enable regular citizens to become part of a 21st-century way of doing science. The programs also demonstrate how CSs help professional scientists to advance knowledge, which helps speed up new discoveries and innovations. The Crowd & The Cloud is based upon work supported by the National Science Foundation.
Since 1975, in order to improve earthquake detection and collect useful information, the European-Mediterranean Seismological Centre monitors the visits of earthquake eyewitnesses to its website and relies on Facebook and Twitter.
Citizen science has been used to provide valuable data in hydrology (catchment science), notably flood risk, water quality and water resource management. A growth in internet use and smartphone ownership has allowed users to collect and share real-time flood-risk information using, for example, social media and web-based forms. Although traditional data collection methods are well-established, citizen science is being used to fill the data gaps on a local level, and is therefore meaningful to individual communities. It has been demonstrated that citizen science is particularly advantageous during a flash flood because the public are more likely to witness these rarer hydrological events than scientists.
Plastics and pollution
Citizen science includes projects that help monitor plastics and their associated pollution. These include The Ocean Cleanup, #OneLess, The Big Microplastic Survey, EXXpedition and Alliance to End Plastic Waste. Ellipsis seeks to map the distribution of litter using aerial data mapping by unmanned aerial vehicles and machine learning software. A Zooniverse CS project (now finished) called The Plastic Tide helped train an algorithm used by Ellipsis.
- The European Environment Agency launched an initiative called "Marine Litter Watch" in June 2018. This uses mobile phones to: (quote) "help individuals and communities come together to clean up Europe’s beaches."
- PlasticPatrol seeks to log and record plastic pollution: (quote) "The Plastic Patrol app is a real world tool that combines citizen science and scientific analysis to help us gather crucial insight into plastic pollution."
- Litterati's mission is to eradicate litter: (quote) "When millions of people come together, the impossible becomes reality, and change happens."
- Anecdata helps anyone and any organisation to create a project: (quote) "Anecdata helps individuals and organizations collect, manage, and share their citizen science data, providing both web-based and mobile solutions for gathering and accessing observations."
- In the UK #2minutebeachclean seeks to purge plastics in coastal environments. They offer an app and a beachclean board, which can be displayed on beaches: (quote) "We believe that every piece of litter removed from the beach matters. So it doesn’t matter if you do 2 minutes or 30."
Examples of relevant articles (by date):
- Citizen Science Promotes Environmental Engagement: (quote) "Citizen science projects are rapidly gaining popularity among the public, in which volunteers help gather data on species that can be used by scientists in research. And it’s not just adults who are involved in these projects – even kids have collected high-quality data in the US."
- Tackling Microplastics on Our Own: (quote) "Plastics, ranging from the circles of soda can rings to microbeads the size of pinheads, are starting to replace images of sewage for a leading cause of pollution – especially in the ocean". Further, "With recent backing from the Crowdsourcing and Citizen Science Act, citizen science is increasingly embraced as a tool by US Federal agencies."
- Citizen Scientists Are Tracking Plastic Pollution Worldwide: (quote) "Scientists who are monitoring the spread of tiny pieces of plastic throughout the environment are getting help from a small army of citizen volunteers – and they’re finding bits of polymer in some of the most remote parts of North America."
- Citizen science could help address Canada's plastic pollution problem: (quote) "But citizen engagement and participation in science goes beyond beach cleanups, and can be used as a tool to bridge gaps between communities and scientists. These partnerships between scientists and citizen scientists have produced real world data that have influenced policy changes."
Examples of relevant scientific studies include (by date):
- Distribution and abundance of small plastic debris on beaches in the SE Pacific (Chile): a study supported by a citizen science project: (quote) "The citizen science project "National Sampling of Small Plastic Debris" was supported by schoolchildren from all over Chile who documented the distribution and abundance of small plastic debris on Chilean beaches. Thirty-nine schools and nearly 1000 students from continental Chile and Easter Island participated in the activity."
- Incorporating citizen science to study plastics in the environment: (quote) "Taking advantage of public interest in the impact of plastic on the marine environment, successful Citizen Science (CS) programs incorporate members of the public to provide repeated sampling for time series as well as synoptic collections over wide geographic regions."
- Assessing the citizen science approach as tool to increase awareness on the marine litter problem:(quote) "This paper provides a quantitative assessment of students' attitude and behaviors towards marine litter before and after their participation to SEACleaner, an educational and citizen science project devoted to monitor macro- and micro-litter in an Area belonging to Pelagos Sanctuary."
- Making citizen science count: Best practices and challenges of citizen science projects on plastics in aquatic environments:(quote) "Citizen science is a cost-effective way to gather data over a large geographical range while simultaneously raising public awareness on the problem".
Africa, Asia and South America
- In South Africa (SA), CS projects include: the Stream Assessment Scoring System (miniSASS) which "encourages enhanced catchment management for water security in a climate stressed society."
- Also in SA, "Members of the public, or 'citizen scientists' are helping researchers from the University of Pretoria to identify Phytophthora species present in the fynbos."
- In June 2016, citizen science experts from across East Africa gathered in Nairobi, Kenya for a symposium organised by the Tropical Biology Association (TBA) in partnership with the Centre for Ecology & Hydrology (CEH). The aim was "to harness the growing interest and expertise in East Africa to stimulate new ideas and collaborations in citizen science." Rosie Trevelyan of the TBA said: "We need to enhance our knowledge about the status of Africa's species and the threats facing them. And scientists can't do it all on their own. At the same time, citizen science is an extremely effective way of connecting people more closely to nature and enrolling more people in conservation action".
- The website Zooniverse hosts several African CS projects, including: Snapshot Serengeti, Wildcam Gorongosa and Jungle Rhythms.
- Nigeria has the Ibadan Bird Club whose to aim is to "exchange ideas and share knowledge about birds, and get actively involved in the conservation of birds and biodiversity."
- In Namibia, Giraffe Spotter.org is "project that will provide people with an online citizen science platform for giraffes".
- Within the Republic of the Congo, the territories of an indigenous people have been mapped so that "the Mbendjele tribe can protect treasured trees from being cut down by logging companies". An Android open-source app called Sapelli was used by the Mbendjele which helped them map "their tribal lands and highlighted trees that were important to them, usually for medicinal reasons or religious significance. Congolaise Industrielle des Bois then verified the trees that the tribe documented as valuable and removed them from its cutting schedule. The tribe also documented illegal logging and poaching activities."
- In West Africa, the irradication of the recent outbreak of Ebola virus disease was partly helped by CS. "Communities learnt how to assess the risks posed by the disease independently of prior cultural assumptions, and local empiricism allowed cultural rules to be reviewed, suspended or changed as epidemiological facts emerged." "Citizen science is alive and well in all three Ebola-affected countries. And if only a fraction of the international aid directed at rebuilding health systems were to be redirected towards support for citizen science, that might be a fitting memorial to those who died in the epidemic."
Some examples CS projects in Asia are:
- The Hong Kong Birdwatching Society was established in 1957, and is the only local civil society aiming at appreciating and conserving Hong Kong birds and their natural environment. Their bird surveys go back to 1958, and they carry out a number of Citizen Science events such as their yearly sparrow census.
- The Bird Count India partnership consists of a large number of organizations and groups involved in birdwatching and bird surveys. They coordinate a number of Citizen Science projects such as the Kerala Bird Atlas and Mysore city Bird Atlas that map the distribution and abundance of birds of entire Indian states.
- The Taiwan Roadkill Observation Network is a Citizen Science project where roadkill across Taiwan is photographed and sent to the Endemic Species Research Institute for study. Its primary goal has been to set up an eco-friendly path to mitigate roadkill challenges and popularize national discourse on environmental issues and civil participation in scientific research.
- Japan has a long history of citizen science involvement, the 1,200-year-old tradition of collecting records on cherry blossom flowering probably being the world's longest-running citizen science project. One of the most influential citizen science projects has also come out of Japan: Safecast. Dedicated to open citizen science for the environment, Safecast was established in the wake of the Fukushima nuclear disaster, and produces open hardware sensors for radiation and air-pollution mapping. Presenting this data via a global open data network and maps
CS projects in South America include:
- In 2015 the Asháninka people from Apiwtxa, which crosses the border between Brazil and Peru, began using the Android app Sapelli to monitor their land. The Ashaninka have "faced historical pressures of disease, exploitation and displacement, and today still face the illegal invasion of their lands by loggers and hunters. This monitoring project shows how the Apiwtxa Ashaninka from the Kampa do Rio Amônia Indigenous Territory, Brazil, are beginning to use smartphones and technological tools to monitor these illegal activities more effectively."
- In Argentina, two smartphone Android applications are available for CS. i) AppEAR has been developed at the Institute of Limnology and was launched in May 2016. Joaquín Coachman is a researcher who developed an "application that appeals to the collaboration of users of mobile devices in collecting data that allow the study of aquatic ecosystems" (translation). Coachman stated: "Not much of citizen science in Argentina, just a few more oriented to astronomy specific cases. As ours is the first. And I have volunteers from different parts of the country that are interested in joining together to centralize data. That's great because these types of things require many people participate actively and voluntarily" (translation). ii) eBird was launched in 2013, and has so far identified 965 species of birds. eBird in Argentina is "developed and managed by the Cornell Lab of Ornithology at Cornell University, one of the most important ornithological institutions in the world, and locally presented recently with the support of the Ministry of Science, Technology and Productive Innovation of the Nation (MINCyT)" (translation).
- Projects in Brazil include: i) Platform and mobile app 'Missions' has been developed by IBM in their São Paulo research lab with Brazil's Ministry for Environment and Innovation (BMEI). Sergio Borger, an IBM team lead in São Paulo, devised the crowdsourced approach when BMEI approached the company in 2010. They were looking for a way to create a central repository for the rainforest data. Users can upload photos of a plant species and its components, enter its characteristics (such as color and size), compare it against a catalog photo and classify it. The classification results are juried by crowdsourced ratings. ii) Exoss Citizen Science is a member of Astronomers Without Borders and seeks to explore the southern sky for new meteors and radiants. Users can report meteor fireballs through uploading pictures on to a webpage or by linking to YouTube.  Their initial goal "was to gather 2.5 million occurrence records of species from biological collections in Brazil and abroad up to the end of 2016. It is now expected that SiBBr will reach nine million records in 2016." Andrea Portela said: "In 2016, we will begin with the citizen science. They are tools that enable anyone, without any technical knowledge, to participate. With this we will achieve greater engagement with society. People will be able to have more interaction with the platform, contribute and comment on what Brazil has. iv) The Brazilian Marine Megafauna Project (Iniciativa Pro Mar) is working with the European CSA towards its main goal, which is the "sensibilization of society for marine life issues" and concerns about pollution and the over-exploitation of natural resources. Having started as a project monitoring manta ray, it now extends to whale shark and educating schools and divers within the Santos area. Its social media activities include a live streaming of a CS course to help divers identify marine megafauna. v) A smartphone app called Plantix has been developed by the Leibniz Centre for Agricultural Landscape Research (ZALF) which helps Brazilian farmers discover crop diseases quicker and helps fight them more efficiently. Brazil is a very large agricultural exporter, but between 10-30% of crops fail because of disease. "The database currently includes 175 frequently occurring crop diseases and pests as well as 40,000 photos. The identification algorithm of the app improves with every image which records a success rate of over 90 per cent as of approximately 500 photos per crop disease." vi) In an Atlantic Ocean forest region in Brazil, an effort to map the genetic riches of soil is under way. The Drugs From Dirt initiative, based at the Rockefeller University, seeks to turn up bacteria that yield new types of antibiotics- the Brazilian region being particularly rich in potentially useful bacterial genes. Approximately a quarter of the 185 soil samples have been taken by Citizen Scientists without which the project could not run.
- In Chile CS projects include (some websites in Spanish): i) Testing new cancer therapies with scientists from the Science Foundation for Life. ii) Monitoring the population of the Chilean bumblebee. iii) Monitoring the invasive ladybird Chinita arlequín. iv) Collecting rain water data. v) Monitoring various pollinating fly populations. vi) Providing information and field data on the abundance and distribution of various species of rockfish.
- Projects in Colombia include (some websites in Spanish): i) The Communications Project of the Humboldt Institute along with the Organization for Education and Environmental Protection initiated projects in the Bogotá wetlands of Cordoba and El Burro, which have a lot of biodiversity. ii) In the Model Forest of Risaralda, the Colombia 'proyecto de Ciencia Abierta y Colaborativa' promotes citizen participation in research related to how the local environment is adapting to climate change. The first meeting took place in the Flora and Fauna Sanctuary Otún Quimbaya. iii) The Citizen Network Environmental Monitoring (CLUSTER), based in the city of Bucaramanga, seeks to engage younger students in data science, who are trained in building weather stations with open repositories based on free software and open hardware data. iv) The Symposium on Biodiversity has adapted the CS tool iNaturalist for use in Colombia. v) The Sinchi Amazonic Institute of Scientific Research seeks to encourage the development and diffusion of knowledge, values and technologies on the management of natural resources for ethnic groups in the Amazon. This research should further the use of participatory action research schemes and promoting participation communities.
- Since 2010, the Pacific Biodiversity Institute (PBI) seeks "volunteers to help identify, describe and protect wildland complexes and roadless areas in South America". The PBI "are engaged in an ambitious project with our Latin American conservation partners to map all the wildlands in South America, to evaluate their contribution to global biodiversity and to share and disseminate this information."
The first Conference on Public Participation in Scientific Research was held in Portland, Oregon in August 2012. Citizen science is now often a theme at large conferences, such as the annual meeting of the American Geophysical Union.
In 2010, 2012 and 2014 there were three Citizen Cybersience summits, organised by the Citizen Cyberscience Centre in Geneva and University College London. The 2014 summit was hosted in London and attracted over 300 participants.
The first citizen science conference hosted by the Citizen Science Association was in San Jose, California, in February 2015 in partnership with the AAAS conference. The Citizen Science Association conference, CitSci 2017, was held in Saint Paul, Minnesota, United States, between 17 and 20 May 2017. The conference had more than 600 attendees. The next CitSci is in March 2019 in Raleigh, USA.
National and regional portals
|Nation or region||Portal|
|Australia||Australian Citizen Science Association|
|Australia||Australian Citizen Science Project Finder|
|Belgium (Flanders)||Citizen Science Vlaanderen|
|Canada||Citizen science portal|
|Denmark||Citizen Science Portalen|
|Germany||Bürger schaffen Wissen|
|Global||Zooniverse: People-powered research|
|Ireland||Environmental Protection Agency|
|Netherlands and Flanders||EOS Wetenschap|
|Scotland||Citizen Science with TCV.|
|Spain||Observatorio De La Ciencia Ciudadana|
|Sweden||Arenas for co-operation through citizen science|
|United Kingdom||UK Environment Observation Framework|
|United States||USA Government Official Website|
- Independent scientist
- Independent scholar
- List of citizen science projects
- List of distributed computing projects
- Open science
- Open-source intelligence
- Open-Source Lab (book)
- Outsider art (produced by artists that are non-institutionalized, in the same way as citizen scientists)
- Participation (decision making)
- Reinventing Discovery
- Popular science
- Public participation
- Scientific instrument
- Virtual volunteering
- Gura, Trisha (2013). "Citizen science: amateur experts". Nature. 496 (7444): 259–261. doi:10.1038/nj7444-259a. PMID 23586092.
- Hand, E. (2010). "Citizen science: People power". Nature. 466 (7307): 685–687. doi:10.1038/466685a. PMID 20686547.
- C. Doyle; R. David; Y.Li; M. Luczak-Roesch; D. Anderson; C.M Pearson (30 June 2019). Using the Web for Science in the Classroom: Online Citizen Science Participation in Teaching and Learning. doi:10.1145/3292522.3326022. ISBN 978-1-4503-6202-3. Retrieved 30 July 2019.
- "Alexa.com: inaturalist.org Competitive Analysis, Marketing Mix and Traffic".
- "Alexa.com: ebird.org Competitive Analysis, Marketing Mix and Traffic".
- "Alexa.com: zooniverse.org Competitive Analysis, Marketing Mix and Traffic".
- H. Riesch; C. Potter (2014). "Citizen science as seen by scientists: Methodological, epistemological and ethical dimensions". Public Understanding of Science. 23 (1): 107–120. doi:10.1177/0963662513497324. PMID 23982281.
- Alan Irwin (1995). Citizen Science: A Study of People, Expertise and Sustainable Development. Routledge.
- R. Bonney; H. Ballard; R. Jordan; E. McCallie; T. Phillips; J. Shirk; C. C. Wilderman (2009). "Bonney et al. 2009 CAISE Report on Public Participation in Scientific Research. A CAISE Inquiry Group Report". Washington, D.C.: Center for Advancement of Informal Science Education (CAISE).
- Cavalier, Darlene; Kennedy, Eric (2016). The Rightful Place of Science: Citizen Science. Tempe, AZ: Consortium for Science, Policy & Outcomes. p. 54. ISBN 9780692694831.
- "New words list June 2014". Oxford English Dictionary. Archived from the original on 9 May 2016. Retrieved 3 June 2016.
- "'Citizen science' added to Oxford English Dictionary". The Daily Zooniverse. 16 September 2014. Archived from the original on 16 June 2016. Retrieved 3 June 2016.
- James Oberg (11 October 1979). "The Failure of the 'Science' of Ufology". New Scientist. Vol. 84 no. 1176. pp. 102–105.
- Muki Haklay (2015). "Citizen Science and Policy: A European Perspective" (PDF). Woodrow Wilson International Center for Scholars. p. 11. Archived (PDF) from the original on 18 October 2016. Retrieved 3 June 2016.
- R. Kerson (1989). "Lab for the Environment". MIT Technology Review. Vol. 92 no. 1. pp. 11–12.
- "Green paper on Citizen Science for Europe: Towards a society of empowered citizens and enhanced research". European Commission. 21 January 2014. Archived from the original on 17 October 2016. Retrieved 18 August 2016.
- "Green paper on Citizen Science". Socientize.eu. 2013. p. 6. Archived from the original on 26 December 2015. Retrieved 18 August 2016.
- Silvertown, Jonathan (2009). "A new dawn for citizen science". Trends in Ecology & Evolution. 24 (9): 467–471. doi:10.1016/j.tree.2009.03.017. PMID 19586682.
- Osborn, D. A. (2002). "Monitoring Rocky Intertidal Shorelines: A Role for the Public in Resource Management". California and the World Ocean 02. 175. p. 57. doi:10.1061/40761(175)57. ISBN 978-0-7844-0761-5.
- Brossard, D.; Lewenstein, B.; Bonney, R. (2005). "Scientific knowledge and attitude change: The impact of a citizen science project". International Journal of Science Education. 27 (9): 1099–1121. Bibcode:2005IJSEd..27.1099B. doi:10.1080/09500690500069483.
- Bauer, M. W.; Petkova, K.; Boyadjieva, P. (2000). "Public Knowledge of and Attitudes to Science: Alternative Measures That May End the "Science War"". Science, Technology & Human Values. 25: 30–51. doi:10.1177/016224390002500102.
- Bonney, R.; Cooper, C. B.; Dickinson, J.; Kelling, S.; Phillips, T.; Rosenberg, K. V.; Shirk, J. (2009). "Citizen Science: A Developing Tool for Expanding Science Knowledge and Scientific Literacy". BioScience. 59 (11): 977–984. doi:10.1525/bio.2009.59.11.9.
- Silvertown, J. (2009). "A new dawn for citizen science". Trends in Ecology & Evolution. 24 (9): 467–471. doi:10.1016/j.tree.2009.03.017. PMID 19586682.
- OSTP (23 March 2015). "Fact Sheet: Empowering Students and Others through Citizen Science and Crowdsourcing" (PDF). The White House. Archived from the original (PDF) on 22 March 2016. Retrieved 24 April 2016.
- "Citizen Science: Theory and Practice". The Citizen Science Association and Ubiquity Press. 20 May 2016. Archived from the original on 24 May 2016. Retrieved 22 May 2016.
- R. Bonney; C. Cooper; H. Ballard (20 May 2016). "The Theory and Practice of Citizen Science: Launching a New Journal". Citizen Science: Theory and Practice. 1 (1): 1. doi:10.5334/cstp.65.
- B. Lewenstein (8 June 2004). "What does citizen science accomplish?". Cornell University. Archived from the original on 9 October 2014. Retrieved 16 September 2014. Cite journal requires
- Von Hippel, Frank (1991). Citizen scientist. New York: American Institute of Physics. ISBN 978-0-88318-709-8.
- Beckwith, Jonathan R. (2002). Making genes, making waves: a social activist in science. Cambridge: Harvard University Press. ISBN 978-0-674-00928-8.
- Neal Lane, "Remarks" at Panel Discussion on Future of Federal Funding for Science and Engineering, Rutgers University, 8 April 1996. Steve Schneider remarks at AAAS meeting, February 1997 Archived 29 September 2007 at the Wayback Machine; see here "Schneider offers three questions to make a citizen-scientist (2/97)". Archived from the original on 9 June 2007. Retrieved 18 August 2007.
- Clark, F.; Illman, D. L. (2001). "Dimensions of Civic Science: Introductory Essay". Science Communication. 23: 5–27. doi:10.1177/1075547001023001002.
- Haklay, Muki (2012) in Citizen Science and Volunteered Geographic Information: Overview and Typology of Participation. Crowdsourcing Geographic Knowledge. 2013, pp. 105–122.
- Eric Larson (26 May 2014). "What Is Citizen Science, and How Can You Get Involved?". Mashable. Archived from the original on 10 November 2017.
- "What is Citizen Science?". Australian Citizen Science Association. Retrieved 10 July 2018.
- "Discover Another Side of Scientific Research" (PDF). Australian Citizen Science Association. Retrieved 10 July 2018.
- Ceccaroni, L., & Piera, J. (Eds.) (2016). Analyzing the role of citizen science in modern research. IGI Global. ISBN 9781522509622. Retrieved 27 September 2018.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- S. Chmielewski; M. Samulowska; M. Lupa; B. Zagajewski (September 2017). "Citizen science and WebGIS for outdoor advertisement visual pollution assessment". Computers Environment and Urban Systems. 67: 97–109. doi:10.1016/j.compenvurbsys.2017.09.001.
- A. Williams (9 February 2009). "Crowdsourcing versus citizen science". Anthony D. Williams. Archived from the original on 15 September 2014. Retrieved 15 September 2014.
- SciCurious (7 January 2013). "Citizen Science, Citizen Policy". Scientific American. Archived from the original on 23 April 2017. Retrieved 23 April 2017.
- Thelen, Brett Amy; Thiet, Rachel K. (2008). "Cultivating connection: Incorporating meaningful citizen science into Cape Cod National Seashore's estuarine research and monitoring programs". Park Science. 25 (1). ISSN 1090-9966. Archived from the original on 1 January 2014. Retrieved 11 October 2012.
- Frías, O.; Bautista, L. M.; Dénes, F. V.; Cuevas, J. A.; Martínez, F.; Blanco, G. (2018). "Influence of habitat suitability and sex-related detectability on density and population size estimates of habitat-specialist warblers". PLoS ONE. 13 (7): 020148. Bibcode:2018PLoSO..1301482F. doi:10.1371/journal.pone.0201482. PMID 30059562.
- M. M. Gardiner; L. L. Allee; P. M. J. Brown; J. E. Losey; H. E. Roy; R. Rice Smyth (November 2012). "Lessons from lady beetles: accuracy of monitoring data from US and UK citizen-science programs" (PDF). Frontiers in Ecology and the Environment. 10 (9): 471–476. doi:10.1890/110185.
- Margaret Kosmala; Andrea Wiggins; Alexandra Swanson; Brooke Simmons (1 December 2016). "Assessing Data Quality in Citizen Science". Frontiers in Ecology and the Environment. 14 (10): 551–560. doi:10.1002/fee.1436.
- Semeniuk, Ivan (7 October 2018). "The butterfly effect: How Canadians and their smartphones are helping scientists map species diversity". The Globe and Mail. Archived from the original on 13 October 2018. Retrieved 13 October 2018.
- Soroye, Peter; Ahmed, Najeeba; Kerr, Jeremy T. (3 July 2018). "Opportunistic citizen science data transform understanding of species distributions, phenology, and diversity gradients for global change research". Global Change Biology. 24 (11): 5281–5291. Bibcode:2018GCBio..24.5281S. doi:10.1111/gcb.14358.
- Emma Gannon (18 May 2015). "Wyoming Criminalizes Citizen Science". Courthouse News Service. Archived from the original on 9 February 2016. Retrieved 29 December 2015.
- D. B. Resnik; K. C. Elliot; A. K. Miller (December 2015). "A framework for addressing ethical issues in citizen science". Environmental Science & Policy. 54: 475–481. doi:10.1016/j.envsci.2015.05.008.
- A. E. Bowser; A. Wiggins (2015). "Privacy in Participatory Research: Advancing Policy to support Human Computation". Human Computation: 19–44. doi:10.1534/hc.v2i1.3 (inactive 23 August 2019).
- S. Hoffman (September 2014). "Citizen Science: The Law and Ethics of Public Access to Medical Big Data". Berkeley Technology Law Journal. Case Legal Studies Research Paper No. 2014-21.
- T. Scassa; Chung H. (2015). "Managing Intellectual Property Rights in Citizen Science: A Guide for Researchers and Citizen Scientists" (PDF). Woodrow Wilson International Center for Scholars. Archived (PDF) from the original on 5 July 2017.
- "CSA Working Group on Ethics". Citizen Science Association. Archived from the original on 25 August 2017. Retrieved 24 August 2017.
- "ECSA Principles & Standards in Citizen Science: Sharing Best Practice & Building Capacity". ECSA. Archived from the original on 18 August 2016. Retrieved 18 August 2016.
- European Citizen Science Association (September 2015). "10 Principles of Citizen Science (English)" (PDF). ECSA. Archived (PDF) from the original on 22 August 2016. Retrieved 18 August 2016.
- "ECSA Documents". ECSA. September 2015. Archived from the original on 22 August 2016. Retrieved 18 August 2016.
- M. A. Graber; A. Graber (30 November 2012). "Internet-based crowdsourcing and research ethics:the case for IRB review". Journal of Medical Ethics. 39 (2): 115–118. doi:10.1136/medethics-2012-100798.
- "Ethical Issues in Citizen Science". Citizen Science: Theory and Practice. Ubiquity Press. 7 March 2019. Retrieved 12 March 2019.
- Fa-ti Fan; Shun-Ling Chen (1 June 2019). "Citizen Science: Practices and Problems". East Asian Science, Technology and Society : An International Journal. 13 (2). ISSN 1875-2160.
- Fa-ti Fan; Shun-Ling Chen (1 June 2019). "Citizen, Science, and Citizen Science". East Asian Science, Technology and Society. 13 (2): 181–193. doi:10.1215/18752160-7542643.
- R. Bonney; T. B. Phillips; H. L. Ballard; J. W. Enck (1 January 2016). "Can citizen science enhance public understanding of science?". Public Understanding of Science. 25 (1): 2–16. doi:10.1177/0963662515607406.
- Henry Sauermann; Chiara Franzoni (20 January 2015). "Crowd science user contribution patterns and their implications". Proceedings of the National Academy of Sciences of the United States of America. 112 (3): 679–684. Bibcode:2015PNAS..112..679S. doi:10.1073/pnas.1408907112. PMC 4311847. PMID 25561529.
- J. Theobald; A. K. Ettinger; H. K. Burgess; L. B. DeBey; N. R. Schmidt; H. E. Froehlich; C. Wagner; J. HilleRisLambers; J. Tewksbury; M. A. Harsch; J. K. Parrish (1 January 2015). "Global change and local solutions: Tapping the unrealized potential of citizen science for biodiversity research". Biological Conservation. 181 (2015): 236–244. doi:10.1016/j.biocon.2014.10.021.
- R. Bonney; T.B. Phillips; J. Enck; J. Shirk; N. Trautmann (1 January 2015). "Citizen Science and Youth Education". Center for Advancement of Informal Science Education. Archived from the original on 22 January 2018. Retrieved 21 January 2018.
- A. Ruck (25 August 2016). "School-based Citizen Science and its Contribution to Environmental Education Outcomes: a Literature Review". European Educational Research Association. Archived from the original on 22 January 2018. Retrieved 21 January 2018.
- P. Cain; Y.Glass; J. Nider; S. Prakash; L. Rice (2012). "Hands-on Activity: Citizen Science with Zooniverse". Kansas State University. Archived from the original on 22 January 2018. Retrieved 21 January 2018.
- N. Trautmann; J. Fee; T.M. Tomasek; N.L.R. Bergey (28 February 2014). Citizen Science: 15 Lessons That Bring Biology to Life. National Science Teachers Association. ISBN 9781936959082.
- "Citizen Science Toolkit". California Academy of Sciences. 2015. Archived from the original on 22 January 2018. Retrieved 21 January 2018.
- "Lesson Plans – Citizen Science". NASA. 7 November 2017. Archived from the original on 10 July 2017. Retrieved 21 January 2018.
- M.P. Mueller; D.J. Tippins (23 November 2011). Citizen Science, Ecojustice, and Science Education: Rethinking an Education from Nowhere. 24. Springer International Handbooks of Education. doi:10.1007/978-1-4020-9041-7_58. ISBN 978-1-4020-9040-0.
- S.A. Gray; K. Nicosia; R.C. Jordan (August 2012). "Lessons Learned from Citizen Science in the Classroom". Democracy and Education. 20 (2). Archived from the original on 23 January 2018.
- M.P. Mueller; D. Tippins; L.A. Bryan (2012). "The Future of Citizen Science". Democracy and Education. 20 (1).
- R. Edwards (2014). "Citizen Science and Lifelong Learning". Studies in the Education of Adults. 46 (2): 132–144. doi:10.1080/02660830.2014.11661662. ISSN 0266-0830.
- H.R. Shah; L.R. Martinez (March 2015). "Current Approaches in Implementing Citizen Science in the Classroom". Microbiology & Biology Education. 17 (1): 17–22. doi:10.1128/jmbe.v17i1.1032. PMC 4798802. PMID 27047583.
- N. Mitchell; M. Triska; A. Liberatore; L. Ashcroft; R. Weatherill; N. Longnecker (1 November 2017). "Benefits and Challenges of Incorporating Citizen Science into University Education". PLOS ONE. 12 (11): e0186285. Bibcode:2017PLoSO..1286285M. doi:10.1371/journal.pone.0186285. PMC 5665417. PMID 29091933.
- Silvertown, J (2009). "A new dawn for citizen science". Trends in Ecology and Evolution. 24 (9): 467–471. doi:10.1016/j.tree.2009.03.017. PMID 19586682.
- Paul Feyerabend (1982). Science in a free society. London: New Left Books. ISBN 978-0-86091-753-3.
- Erwin Chargaff (1978). Heraclitean fire: sketches from a life before nature. New York: Rockefeller University Press. ISBN 978-0-87470-029-9.
- C. Kullenberg; D. Kasperowski (14 January 2016). "What Is Citizen Science? – A Scientometric Meta-Analysis". PLoS ONE. 11 (1): e0147152. Bibcode:2016PLoSO..1147152K. doi:10.1371/journal.pone.0147152. PMC 4713078. PMID 26766577.
- Mims III, Forrest M. (1999). "Amateur Science—Strong Tradition, Bright Future". Science. 284 (5411): 55–56. Bibcode:1999Sci...284...55M. doi:10.1126/science.284.5411.55.
Astronomy has traditionally been among the most fertile fields for serious amateurs [...]
- Kyba, Christopher C. M.; Wagner, Janna M.; Kuechly, Helga U.; Walker, Constance E.; Elvidge, Christopher D.; Falchi, Fabio; Ruhtz, Thomas; Fischer, Jürgen; Hölker, Franz (2013). "Citizen Science Provides Valuable Data for Monitoring Global Night Sky Luminance". Scientific Reports. 3: 1835. Bibcode:2013NatSR...3E1835K. doi:10.1038/srep01835. PMC 3655480. PMID 23677222.
- Sciezor, T. (2013). "A new astronomical method for determining the brightness of the night sky and its application to study long-term changes in the level of light pollution". Monthly Notices of the Royal Astronomical Society. 435 (1): 303–310. Bibcode:2013MNRAS.435..303S. doi:10.1093/mnras/stt1297.
- "The Americal Meteor Society". Archived from the original on 22 August 2006. Retrieved 24 August 2006.
- Lodriguss, Jerry. "Catching the Light: Astrophotography". Archived from the original on 1 September 2006. Retrieved 24 August 2006.
- A. Price; R. Turner; R.E. Stencel; B.K. Kloppenborg; A.A. Henden (12 June 2012). "The Origins and Future of the Citizen Sky Project". Journal of the American Association of Variable Star Observers. 40: 614–617.
- "The UK Butterfly Monitoring Scheme (UKBMS)". Archived from the original on 30 December 2014. Retrieved 29 December 2014.
- Leslie Ries. "Analyzing the NABA Butterfly Count Data" (PDF). Archived (PDF) from the original on 23 December 2016. Retrieved 29 December 2014.
- "Goal 1: Track all North American butterfly monitoring". Archived from the original on 30 December 2014. Retrieved 29 December 2014.
- "eButterfly Homepage". Archived from the original on 8 April 2014.
- "Monarch Watch Homepage". Retrieved 1 January 2015.
- "The Cape May Monarch Monitoring Project". New Jersey Audubon Research Department, and the Cape May Bird Observatory. Archived from the original on 6 October 2014. Retrieved 4 October 2014.
- Rüdisser, Johannes; Tasser, Erich; Walde, Janette; Huemer, Peter; Lechner, Kurt; Ortner, Alois; Tappeiner, Ulrike (1 August 2017). "Simplified and still meaningful: assessing butterfly habitat quality in grasslands with data collected by pupils". Journal of Insect Conservation. 21 (4): 677–688. doi:10.1007/s10841-017-0010-3. ISSN 1366-638X.
- Bonney, R. and LaBranche, M. (2004). Citizen Science: Involving the Public in Research. ASTC Dimensions. May/June 2004, p. 13.
- Baretto, C.; Fastovsky, D.; Sheehan, P. (2003). "A Model for Integrating the Public into Scientific Research". Journal of Geoscience Education. 50 (1): 71–75. Bibcode:2003JGeEd..51...71B. doi:10.5408/1089-9995-51.1.71.
- McCaffrey, R.E. (2005). Using Citizen Science in Urban Bird Studies. Urban Habitats. 3 (1). p. 70-86.
- "North American Phenology Program". Archived from the original on 29 July 2016. Retrieved 30 July 2016.CS1 maint: unfit url (link)
- Wargo, Brian M. (2016). "Bird!": An Exploration of Hawkwatching. McKees Rocks: BMW Endeavors, LLC. ISBN 978-1-945226-00-7.
- Devictor, V.; Whittaker, R. J.; Bel trame, C. (2010). "Beyond scarcity: citizen science programmes as useful tools for conservation biogeography". Diversity and Distributions. 16 (3): 354–362. doi:10.1111/j.1472-4642.2009.00615.x.
- Jiguet, F., Devictor, V., Jul iard, R. & Couvet, D. 2012. "French citizens monitoring ordinary birds provide tools for conservation and ecological sciences". Acta Oecologica-International Journal of Ecology, 44, 58–66.
- "Australian birdlife". 16 July 2014. Retrieved 30 December 2015.
- "Marine Debris Tracker". Marine Debris Tracker. Archived from the original on 27 December 2017. Retrieved 19 March 2018.
- Lauro, Federico M.; Senstius, Svend Jacob; Cullen, Jay; Neches, Russell; Jensen, Rachelle M.; Brown, Mark V.; Darling, Aaron E.; Givskov, Michael; McDougald, Diane (9 September 2014). "The Common Oceanographer: Crowdsourcing the Collection of Oceanographic Data". PLoS Biol. 12 (9): e1001947. doi:10.1371/journal.pbio.1001947. PMC 4159111. PMID 25203659.
- "Monitoring through many eyes project homepage". Queensland Government, Queensland University of Technology, CRCSI. Archived from the original on 1 March 2017. Retrieved 10 May 2017.
- "Volunteers help to ensure national marine sanctuaries remain America's underwater treasures for future generations". National Ocean Servi, NOAA, Department of Commerce. Archived from the original on 6 September 2017. Retrieved 5 September 2017.
- Bourjon, Philippe; Ducarme, Frédéric; Quod, Jean-Pascal; Sweet, Michael (2018). "Involving recreational snorkelers in inventory improvement or creation: a case study in the Indian Ocean". Cahiers de Biologie Marine. 59: 451–460. doi:10.21411/CBM.A.B05FC714.
- Gosset, William S. (1936). "Co-Operation in Large-Scale Experiments". Supplement to the Journal of the Royal Statistical Society. 3 (2): 115–136. doi:10.2307/2983667. JSTOR 2983667.
- Ryan, S.F; Adamson, N.L.; Aktipis, A.; Andersen, L.K.; Austin, R.; Barnes, L.; Beasley, M.R.; Bedell, K.D.; Briggs, S.; Chapman, B. (2018). "The role of citizen science in addressing grand challenges in food and agriculture research". Proceedings of the Royal Society B. 285 (1891): 20181977. doi:10.1098/rspb.2018.1977. PMC 6253361. PMID 30464064.
- van Etten, Jacob; de Sousa, Kauê; Aguilar, Amílcar; Barrios, Mirna; Coto, Allan; Dell’Acqua, Matteo; Fadda, Carlo; Gebrehawaryat, Yosef; van de Gevel, Jeske; Gupta, Arnab; Kiros, Afewerki Y.; Madriz, Brandon; Mathur, Prem; Mengistu, Dejene K.; Mercado, Leida; Nurhisen Mohammed, Jemal; Paliwal, Ambica; Pè, Mario Enrico; Quirós, Carlos F.; Rosas, Juan Carlos; Sharma, Neeraj; Singh, S.S.; Solanki, Iswhar S.; Steinke, Jonathan (2019). "Crop variety management for climate adaptation supported by citizen science". Proceedings of the National Academy of Sciences of the United States of America. 285 (1891): 20181977. doi:10.1073/pnas.1813720116. PMC 6410884. PMID 30782795.
- "AnnoTate homepage". Zooniverse. Archived from the original on 7 May 2016. Retrieved 2 June 2016.
- "ARTigo homepage". ARTigo. Archived from the original on 1 June 2016. Retrieved 2 June 2016.
- Dan Drollette (29 March 2012). "Citizen science enters a new era". BBC. Archived from the original on 18 October 2014. Retrieved 4 October 2014.
- Pearce, Joshua M. (14 September 2012). "Building Research Equipment with Free, Open-Source Hardware". Science. 337 (6100): 1303–1304. Bibcode:2012Sci...337.1303P. doi:10.1126/science.1228183. ISSN 0036-8075. PMID 22984059.
- Pearce, J. M. (20 June 2015). "Return on investment for open source scientific hardware development". Science and Public Policy. 43 (2): 192–195. doi:10.1093/scipol/scv034. ISSN 0302-3427.
- Baden, Tom; Chagas, Andre Maia; Gage, Greg; Marzullo, Timothy; Prieto-Godino, Lucia L.; Euler, Thomas (2015). "Open Labware: 3-D Printing Your Own Lab Equipment". PLOS Biology. 13 (3): e1002086. doi:10.1371/journal.pbio.1002086. PMC 4368627. PMID 25794301.
- Contributors, Public Lab. "Public Lab: a DIY environmental science community". publiclab.org. Archived from the original on 26 February 2016. Retrieved 27 February 2016.
- Damase, Tulsi R.; Stephens, Daniel; Spencer, Adam; Allen, Peter B. (2015). "Open source and DIY hardware for DNA nanotechnology labs". Journal of Biological Methods. 2 (3): 24. doi:10.14440/jbm.2015.72. PMC 4598940. PMID 26457320.
- C. Zhang; N.C. Anzalone; R.P. Faria; J.M. Pearce (27 March 2013). "Open-Source 3D-Printable Optics Equipment". PLoS ONE. 8 (3): e59840. Bibcode:2013PLoSO...859840Z. doi:10.1371/journal.pone.0059840. PMC 3609802. PMID 23544104.
- Wells, Spencer (2013). "The Genographic Project and the Rise of Citizen Science". Southern California Genealogical Society (SCGS). Archived from the original on 10 July 2013. Retrieved 10 July 2013.
- King, Turi E.; Jobling, Mark A. (2009). "What's in a name? Y chromosomes, surnames and the genetic genealogy revolution" (PDF). Trends in Genetics. 25 (8): 351–60. doi:10.1016/j.tig.2009.06.003. hdl:2381/8106. PMID 19665817.
The International Society of Genetic Genealogy <http://www.isogg.org> advocates the use of genetics as a tool for genealogical research, and provides a support network for genetic genealogists. It hosts the ISOGG Y-haplogroup tree, which has the virtue of being regularly updated.
- Mendex, etc. al., Fernando (28 February 2013). "An African American Paternal Lineage Adds an Extremely Ancient Root to the Human Y Chromosome Phylogenetic Tree". The American Journal of Human Genetics. 92 (3): 454–459. doi:10.1016/j.ajhg.2013.02.002. PMC 3591855. PMID 23453668. Retrieved 10 July 2013. This is volume 92, issue 3, pages 454–459.
- "Astro Drone - A Crowdsourcing Game to Improve Visual Algorithms". European Space Agency. Archived from the original on 11 November 2017. Retrieved 17 January 2018.
- "Citizens in Space". Citizensinspace. Archived from the original on 27 August 2014. Retrieved 15 September 2014.
- ""Teachers in Space" becomes "Citizens in Space"". Citizensinspace.org. Archived from the original on 26 October 2012. Retrieved 6 November 2012.
- Fien, J.; Smith, T. F.; Lazarow, N. S.; Pembleton, J.; Rosenthal, K; Alcock, D.; Thomsen, D. C.; Hudson, K.; Gleeson, J.; Oliver, P.; Gooch, M.; White, C.; Powell, B.; Whelan, J.; Rickson, R.; Eisner, R.; Dwyer, D.; Malawkin, H.; Tilden, J. (1 January 2003). "The Citizen Science Toolbox : Citizen Science: Linking communities, scientists and decision-makers". Archived from the original on 9 August 2016. Retrieved 30 July 2016. Cite journal requires
- Tinati, Ramine; Luczak-Roesch, Markus; Simperl, Elena; Hall, Wendy (2016). Because science is awesome: studying participation in a citizen science game (PDF). Proceedings of the 8th ACM Conference on Web Science. pp. 45–54. doi:10.1145/2908131.2908151. ISBN 9781450342087.
- "Science at Home - About Us". Science at Home. Archived from the original on 18 May 2017. Retrieved 17 January 2018.
- "CODER - AU Ideas Center for Community Driven Research". au.dk. Archived from the original on 11 September 2017.
- "The Internet's hidden science factory". PBS NewsHour. Archived from the original on 11 September 2017. Retrieved 11 September 2017.
- Bohannon, John (10 June 2016). "Mechanical Turk upends social sciences". Science. 352 (6291): 1263–1264. Bibcode:2016Sci...352.1263B. doi:10.1126/science.352.6291.1263. ISSN 0036-8075. PMID 27284175.
- Jacquet, Jennifer. "The pros & cons of Amazon Mechanical Turk for scientific surveys". Scientific American Blog Network. Archived from the original on 11 September 2017. Retrieved 11 September 2017.
- Michael Buhrmester, Tracy Kwang, and Samuel D. Gosling (2011). "Amazon's Mechanical Turk: A New Source of Inexpensive, Yet High-Quality, Data?" (PDF). Perspectives on Psychological Science. 6 (1): 3–5. doi:10.1177/1745691610393980. PMID 26162106. Archived from the original (PDF) on 29 July 2016. Retrieved 11 September 2017 – via SAGE.CS1 maint: multiple names: authors list (link)
- "Citizen scientists" watch for signs of climate change Archived 11 April 2008 at the Wayback Machine, The Christian Science Monitor, 10 April 2008.
- Ballard, H., Pilz, D., Jones, E.T., and Getz, C. (2005). Training Curriculum for Scientists and Managers: Broadening Participation in Biological Monitoring. Corvallis, OR: Institute for Culture and Ecology.
- Cooper, C. B.; Dickinson, J.; Phillips, T.; Bonney, R. (2007). "Citizen Science as a Tool for Conservation in Residential Ecosystems". Ecology and Society. 12 (2). doi:10.5751/es-02197-120211.
- Firehock, K.; West, J. (1995). "A Brief History of Volunteer Biological Water Monitoring Using Macroinvertebrates". Journal of the North American Benthological Society. 14 (1): 197–202. doi:10.2307/1467734. JSTOR 1467734.
- "BugGuide System Statistics". BugGuide.net. 6 October 2014. Archived from the original on 25 April 2013. Retrieved 6 October 2014.
- "New Zooniverse projects – Bat Detective and Click to Cure". European Space Education Resource Office. 30 October 2012. Archived from the original on 14 October 2014. Retrieved 8 October 2014.
- Tinati, Ramine; van Kleek, Max; Simperl, Elena; Luczak-Roesch, Markus; Simpson, Robert; Shadbolt, Nigel (2015). Designing for Citizen Data Analysis: A Cross-Sectional Case Study of a Multi-Domain Citizen Science Platform. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (CHI '15). pp. 4069–4078. doi:10.1145/2702123.2702420. ISBN 9781450331456.
- "Citizen Science Alliance website". Archived from the original on 12 August 2014. Retrieved 28 September 2014.
- Lintott, Chris. "A Whole New Zooniverse". Zooniverse Blog. Archived from the original on 17 June 2016. Retrieved 15 June 2016.
- "Zooniverse Project Builder Policies, or So You Want To Launch a Project?". Zooniverse. Archived from the original on 17 June 2016. Retrieved 15 June 2016.
- "About Us". cosmoquest.org. Archived from the original on 3 August 2016.
- Scifabric. "crowdcrafting". Archived from the original on 2 November 2017. Retrieved 4 October 2014.
- Shuttleworth Foundation. "PyBossa". pybossa.com. Archived from the original on 5 January 2018.
- Project Soothe. "Participate in Project Soothe". projectsoothe.com. Archived from the original on 19 January 2018.
- "San Francisco Parks Alliance ParkScan". San Francisco Parks Alliance. 2014. Archived from the original on 5 August 2016. Retrieved 5 August 2016.
- "The Wildlab". The Wildlab. 2016. Archived from the original on 24 August 2016. Retrieved 5 August 2016.
- "Project Noah". Networked Organisms. 2016. Archived from the original on 12 August 2016. Retrieved 5 August 2016.
- Rozell, Ned (2 April 2015). "Citizen science meets the aurora". University of Alaska Fairbanks Geophysical Institute. Archived from the original on 31 July 2017.
- "Citizen science: Chandra Clarke at TEDxChathamKent". YouTube. 14 March 2014. Archived from the original on 1 August 2014. Retrieved 15 September 2014.
- O'Hanlon, Larry (1 May 2013). "Turn Yourself into a Skyglow Meter". Discovery News. Archived from the original on 3 May 2013. Retrieved 8 May 2013.
- "Sapelli". University College London. 2016. Archived from the original on 17 August 2016. Retrieved 5 August 2016.
- Austrian Citizen Science Conference 2018. Frontiers Media SA. 6 November 2018. pp. 66–69. doi:10.3389/978-2-88945-587-4. ISBN 9782889455874.
- "The Crowd and the Cloud". The Crowd and the Cloud. Archived from the original on 25 April 2017. Retrieved 24 April 2017.
- "EMSC History". The European-Mediterranean Seismological Centre. Archived from the original on 8 September 2017. Retrieved 16 January 2018.
- Starkey, Eleanor; Parkin, Geoff; Birkinshaw, Steve; Large, Andy; Quinn, Paul; Gibson, Ceri (2017). "Demonstrating the value of community-based ('citizen science') observations for catchment modelling and characterisation". Journal of Hydrology. 548: 801–817. Bibcode:2017JHyd..548..801S. doi:10.1016/j.jhydrol.2017.03.019.
- "Community Involvement in UK Catchment Management" (PDF). Foundation for Water Research. Archived (PDF) from the original on 28 April 2017. Retrieved 27 April 2017.
- Newcastle University. "Communities can fill the gaps on flooding". Archived from the original on 28 April 2017. Retrieved 27 April 2017.
- Anna Turns (15 October 2019). "How citizen scientists, technology and people power can help clean up our seas". Evening Standard. Retrieved 20 October 2019.
- "Finding Solutions to Plastic Pollution (How You Can Help)". Lindsay Miles. 10 November 2016. Retrieved 28 October 2019.
- "SciStarter". SciStarter.org. 2019. Retrieved 28 October 2019.
- "Citizen Science Projects on Plastic Pollution" (PDF). A Rocha International. Retrieved 20 October 2019.
- "#OneLess". OneLess 2017. Retrieved 20 October 2019.
- "The Big Microplastic Survey". The Big Microplastic Survey 2018. Retrieved 20 October 2019.
- "eXXpedition". eXXpedition 2019. Retrieved 20 October 2019.
- "Alliance To End Plastic Waste". Alliance to End Plastic Waste. 2019. Retrieved 2 November 2019.
- "Ellipsis". Ellipsis Environmental. 2018. Retrieved 28 October 2019.
- "The Plastic Tide". Zooniverse. 2017. Retrieved 28 October 2019.
- "Mobile Apps and Marine Debris". Sustainable Seas Trust. 29 August 2017. Retrieved 28 October 2019.
- "Citizens collect plastic and data to protect Europe's marine environment". European Environment Agency. 8 June 2018. Retrieved 27 October 2019.
- "Plastic Patrol". Plastic Patrol CIC. Retrieved 20 October 2019.
- "Litterati". Litterati. 2019. Retrieved 28 October 2019.
- "Anecdata". MDI Biological Laboratory. 2019. Retrieved 28 October 2019.
- "MDI Biological Laboratory develops Anecdata citizen science mobile app". American Association for the Advancement of Science. January 2019. Retrieved 28 October 2019.
- "#2minutebeachclean". 2 Minute Beach Clean. Retrieved 21 October 2019.
- Neha Jain (4 January 2018). "Citizen Science Promotes Environmental Engagement". Science Connected, Inc. Retrieved 28 October 2019.
- Alex Long; Anne Bowser (6 February 2018). "Tackling Microplastics on Our Own". Woodrow Wilson International Center for Scholars. Retrieved 28 October 2019.
- Matt Smith (12 March 2018). "Citizen Scientists Are Tracking Plastic Pollution Worldwide". Group Nine Media. Retrieved 28 October 2019.
- Tony Walker (12 September 2019). "Citizen science could help address Canada's plastic pollution problem". The Conversation Trust(UK) Ltd. Retrieved 28 October 2019.
- V. Hidalgo-Ruz; M. Thiel (26 February 2013). "Distribution and abundance of small plastic debris on beaches in theSE Pacific (Chile): A study supported by a citizen science project". Marine Environmental Research. 87-88: 12–18. doi:10.1016/j.marenvres.2013.02.015.
- E.R. Zettler; H. Takada; B. Monteleone; N. Mallos; M. Eriksen; L.A. Amaral-Zettler (14 November 2016). "Incorporating citizen science to study plastics in the environment". Analytical Methods (9): 1392–1403. doi:10.1039/C6AY02716D.
- M.Locritania; S.Merlinob; M.Abbate (March 2019). "Assessing the citizen science approach as tool to increase awareness on the marine litter problem". Assessing the citizen science approach as tool to increase awareness on the marine litter problem. 140: 0320–329. doi:10.1016/j.marpolbul.2019.01.023.
- L. Rambonneta; S.C.Vinka; A.M.Land-Zandstraa; T. Bosker (August 2019). "Making citizen science count: Best practices and challenges of citizen science projects on plastics in aquatic environments". Marine Pollution Bulletin. 145: 271–277. doi:10.1016/j.marpolbul.2019.05.056.
- "How do you make citizen science successful?". Universiteit Leiden. 14 June 2019. Retrieved 2 November 2019.
- "Healthy Rivers – Healthy people: Citizen Science for sustainable water management in a climate stressed society". The Wildlife and Environment Society of South Africa. 2014. Archived from the original on 17 August 2016. Retrieved 20 July 2016.
- Joey Hulbert (10 February 2016). "Citizen engagement in research to protect fynbos – and forests". SA Forestry Online. Archived from the original on 2 August 2016. Retrieved 20 July 2016.
- "Citizen science takes a leap forward in East Africa". Tropical Biology Association. June 2016. Archived from the original on 12 July 2016. Retrieved 20 July 2016.
- "Zooniverse Projects". Zooniverse. Archived from the original on 7 August 2016. Retrieved 20 July 2016.
- "Citizen Science and Bird Conservation in Nigeria" (PDF). Nigerian Conservation Foundation. March 2014. Archived (PDF) from the original on 17 October 2016. Retrieved 20 July 2016.
- Megan Hamilton (15 September 2014). "Citizen science project will benefit Africa's giraffes". Digital Journal. Archived from the original on 22 August 2016. Retrieved 20 July 2016.
- "Mapping Indigenous Territories in Africa". Esri. 2016. Archived from the original on 1 August 2016. Retrieved 20 July 2016.
- Paul Richards (19 May 2016). "How black bin bags and common sense helped end an epidemic, and what we can learn from it". African Arguments. Archived from the original on 30 June 2016. Retrieved 20 July 2016.
- "香港觀鳥會 Hong Kong Bird Watching Society". www.hkbws.org.hk. Retrieved 19 June 2019.
- "hkbws-sparrow". hkbws-sparrow. Retrieved 19 June 2019.
- "Bird Count India". Bird Count India. Retrieved 19 June 2019.
- "台灣動物路死觀察網 Taiwan Roadkill Observation Network | 改善路死、環境教育、全民科學、珍惜生命". roadkill.tw. Retrieved 19 June 2019.
- "Cherry blossom season, Emperor's sake and Citizen Science". Technology Org. 25 March 2015. Retrieved 20 June 2019.
- "Safecast". Safecast. Retrieved 20 June 2019.
- "Ashaninka Land Monitoring Initiative". Global Canopy Programme. April 2016. Archived from the original on 23 April 2016. Retrieved 20 July 2016.
- Marcelo Gisande (7 June 2016). "AppEAR: una aplicación para estudiar ambientes acuáticos con colaboración ciudadana". CONICET. Archived from the original on 12 August 2016. Retrieved 1 August 2016.
- Federico Kukso (2016). "Ciencia ciudadana: la cultura de la colaboración". Archived from the original on 29 August 2016. Retrieved 1 August 2016.
- Kristine A. Wong (27 January 2014). "IBM and SAP open up big data platforms for citizen science". The Guardian. Archived from the original on 26 August 2016. Retrieved 2 August 2016.
- "Exoss Citizen Science". Astronomy Without Borders. July 2015. Archived from the original on 18 August 2016. Retrieved 2 August 2016.
- "SiBBr completes one year with six million records on biodiversity". RNP. 26 November 2015. Archived from the original on 20 September 2016. Retrieved 3 August 2016.
- "Brasil Megafauna Marinha". ECSA. Archived from the original on 18 August 2016. Retrieved 3 August 2016.
- "Crop protection via smart phone: ZALF and PEAT start new Citizen Science project". Leibniz-Zentrum für Agrarlandschaftsforschung. Archived from the original on 18 August 2016. Retrieved 3 August 2016.
- Penny Sarchet (20 January 2015). "Citizen scientists sift soil for new antibiotics". RBI. Archived from the original on 13 April 2016. Retrieved 3 August 2016.
- "Chilecientifico Ciencia Ciudadana". Chilecientífico. Archived from the original on 28 June 2016. Retrieved 29 July 2016.
- "Saving Chile's bumblebee from extinction". Bee Safe. 1 February 2016. Archived from the original on 16 September 2016. Retrieved 29 July 2016.
- A.A. Grez; T. Zaviezo (2015). "Chinita arlequin: Harmonia axryidis en Chile". Chinita Arlequín en Chile. Archived from the original on 2 August 2016. Retrieved 29 July 2016.
- "Pluviómetros Ciudadanos". Dirección General de Aguas: Ministerio de Obras Públicas. Archived from the original on 20 August 2016. Retrieved 29 July 2016.
- "Moscas Floricholas de Chile". Facebook. Archived from the original on 22 January 2017. Retrieved 29 July 2016.
- "Lanzamiento Programa Primera Red de Buzos Deportivos para la Conservación de Peces de Roca". Costa Humboldt. 27 January 2015. Archived from the original on 8 October 2018. Retrieved 29 July 2016.
- "Concluyó proyecto piloto de ciencia ciudadana en humedales de Bogotá". Humboldt Institute. 2014. Archived from the original on 16 August 2016. Retrieved 30 July 2016.
- "Organización para la Educación y Protección Ambiental". OpEPA. 2016. Archived from the original on 10 August 2016. Retrieved 30 July 2016.
- Comunicación RIABM editor (4 August 2015). "Ciencia ciudadana en el Bosque Modelo Risaralda, Colombia". Red Iberoamericana de Bosques Modelo. Archived from the original on 17 October 2016. Retrieved 30 July 2016.CS1 maint: extra text: authors list (link)
- "Red Ambiental Ciudadana de Monitoreo (RACIMO)". Racimo. Archived from the original on 9 August 2016. Retrieved 30 July 2016.
- "SIB Report No.2". Sistema de información sobre Biodiversidad de Colombia. 2013. Archived from the original on 18 August 2016. Retrieved 30 July 2016.
- "Funciones del Instituto". The Sinchi Institute. Archived from the original on 20 August 2016. Retrieved 30 July 2016.
- "Citizen Science Volunteers needed for mapping South American Wetlands". Pacific Biodiversity Institute. Archived from the original on 27 August 2016. Retrieved 20 July 2016.
- Rosner, Hillary (2013). "Data on Wings". Scientific American. 308 (2): 68–73. Bibcode:2013SciAm.308b..68R. doi:10.1038/scientificamerican0213-68. ISSN 0036-8733.
- "ED51A. Era of Citizen Science: Intersection of Outreach, Scientific Research and Big Data I Posters". American Geophysical Union. 13 December 2013. Archived from the original on 9 April 2015. Retrieved 15 September 2014.
- "Citizen Cyberscience Summit (2014 - 2012 - 2010)". CERN, unitar, Universite de Geneve. Archived from the original on 4 June 2016. Retrieved 17 January 2018.
- "Program". ethz.ch. Archived from the original on 3 November 2016.
- "Conference 11–12 February, San Jose, California, USA". Citizen Science Association. Archived from the original on 15 September 2014. Retrieved 15 September 2014.
- "2017 CSA Top Ten Year in Review". The Citizen Science Association. 2017. Archived from the original on 29 December 2017. Retrieved 16 January 2018.
- "CitSci2017: May 17–20th in Saint Paul, Minnesota". Citizen Science Association. 13 July 2016. Archived from the original on 17 October 2016. Retrieved 1 August 2016.
- "Eventarchiv". Citizen Science Platform "Österreich forscht". Archived from the original on 17 October 2016. Retrieved 31 July 2016.
- Franzoni, Chiara; and Henry Sauermann. (2012, November 14). "Crowd Science: The Organization of Scientific Research in Open Collaborative Projects", Research Policy
- Dick Kasperowsik (interviewed by Ulrich Herb): Citizen Science as democratization of science? In: telepolis, 2016, 27 August
- Ridley, Matt. (2012, February 8). "Following the Crowd to Citizen Science", The Wall Street Journal
- Young, Jeffrey R. (2010, May 28). "Crowd Science Reaches New Heights", The Chronicle of Higher Education
- Sauermann, Henry; and Chiara Franzoni (2015, January 20). "Crowd Science User Contribution Patterns and Their Implications", Proceedings of the National Academy of Sciences of the United States of America
- Bourjon, Philippe; Ducarme, Frédéric; Quod, Jean-Pascal; Sweet, Michael (2018). "Involving recreational snorkelers in inventory improvement or creation: a case study in the Indian Ocean". Cahiers de Biologie Marine. 59: 451–460. doi:10.21411/CBM.A.B05FC714.
- Stanford Our Voice Initiative: Citizen Science for Health Equity
- NASA Solve: Citizen Science, Challenges and Prizes at NASA.
- Citizen Science Center
- GeoTag-X run by UNITAR-UNOSAT
- Ibercivis Foundation
- Search and Rescue Citizen Science Experiment by National Research Council Canada
- Atlas. Australia's voice for birds since 1901.
- Indigo V Expeditions. Dedicated to the advancement of citizen oceanography.