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Public engagement is a term that has recently been used, particularly in the UK, to describe "the involvement of specialists listening to, developing their understanding of, and interacting with, non-specialists" (as defined by England's university funding agency, HEFCE, in 2006).
The tradition of a decision-making body getting inputs from those with less power is generally known as “consultation”. This became popular with UK governments during the 1980s and 1990s. Even though most governments that carry out consultations are democratically elected, many people who became involved in these processes were surprised that conduct of such “consultations” was unsatisfactory in at least three respects.
1) Groups that already had influence were often the only ones consulted 2) People who did not have the resources to find out would usually not be able to be part of a consultation, even if the decision it was meant to influence might have a major impact on them. 3) There were no agreed safeguards against consultations being used cynically by decision-makers to make it look like they had sought to canvass other opinions, while in fact having set a new policy in place even before it asked the question.
Theories of public engagement 
Public engagement is a relatively new term, hardly used before the late 1990s. The existing term it shares most in common with is participatory democracy, discussed by thinkers such as Jean-Jacques Rousseau, John Stuart Mill and G D H Cole.
Many see participatory democracy as complementing representative democratic systems, in that it puts decision-making powers more directly in the hands of ordinary people. Rousseau suggested that participatory approaches to democracy had the advantage of demonstrating that “no citizen is a master of another” and that, in society, “all of us are equally dependent on our fellow citizens”. Rousseau suggested that participation in decision –making increases feeling among individual citizens that they belong in their community. Perhaps the most long-standing institution of participatory democracy is the system of trial by jury.
Whilst elected governments make the laws, it is therefore juries that are able to decide the innocence or guilt of anyone charged with breaking many of those laws, making it a key instrument of participatory democracy. Over the centuries they have achieved an importance to many democracies that have had to be fiercely defended. One senior judge surveying the limiting of a government’s power provided by the jury over the centuries compared the jury to: “a little parliament… No tyrant could afford to leave a subject’s freedom in the hands of twelve of his countrymen…. Trial by jury is more than an instrument of justice and more than one wheel of the constitution: it is the lamp that shows that freedom lives”. (Patrick Devlin 1956). Today, jury trials are practised in the UK, US, and many other democracies around the world including Russia, Spain, Brazil and Australia. Perhaps no other institution of government rivals the jury in placing power so directly in the hands of citizens, or wagers more on the truth of democracy’s core claim that the people make their own best governors. Juries are therefore be argued to be the most widespread form of genuine consultation at work in society today.
Good practice in public engagement 
Taking participatory democracy as an ideal for public engagement has significant consequences for how we apply the concept to issues with a scientific or technical element. Instead of merely receiving inputs from various interested parties, a participatory model of consultation forces decision-makers to recognise the democratic accountability of their actions not merely every few years at elections, but in a more systematic, direct sense to citizens.
A common misconception is that there is a particular methodology that can be devised to facilitate all public engagement. Effective participation, by contrast, is conducted on the assumption that each different situation will require a different design, using a new combination of tools as part of an evolving cycle of action and reflection by the institution involved.
Each "experiment" in participatory democracy contains a unique mix of people and institutions. Each method must therefore select elements from a range of different approaches. Participation is also overtly "political" in that it is about humans, power and knowledge – all of which are inherently complex and which together make for a potent mix that requires sensitivity and careful planning. So while participatory processes can be replicated in the same way as scientific protocols, their human ingredients can differ so much that a concentration on replicating what happened elsewhere often hinders the practical application of a technique.
Before describing a scientific experiment, scientists know that it is vital to explain the context in which that experiment takes place. Was the plant in a test tube or in a farmer’s field? Was the rat well fed or starving? This logic also applies in the case of a participatory process, in which the each consultation event is analogous to an experimental subject. Each needs to proceed from an understanding of its our political, scientific, institutional and practical constraints.
Nine principles of public engagement 
1. Participants should join those organising the process in setting terms of reference for the whole exercise, and framing the questions that they will discuss.
2. The group organising, or in overall control of, the process should be broad based, including stakeholders with different interests on the subject being discussed.
3. There should be a diversity of information sources and perspectives available to participants.
4. There should be space for the perspectives of those participants who lack specialist knowledge of the area concerned to engage in a two-way exchange with those possessing specialist knowledge.
5. There should be complete transparency of the activities carried out within the process to those both inside and outside it.
6. Those without a voice in policy-making should be enabled to use the consultation process as a tool for positive political change. This should be embedded in the process by sufficient funds being made available for follow-up work after their initial conclusions have been reached.
7. The process should contain safeguards against decision-makers using a process to legitimise existing assumptions or policies.
8. All groups involved in the process should be given the opportunity to identify possible strategies for longer-term learning, development and change on a range of issues relating to their conclusions.
9. The group organising, or in overall control of, the process should develop an audit trail through the process, to explain whether policies were changed, what was taken into account, what criteria were applied when weighing up the evidence from the process, and therefore how the views of those involved in the participatory process may have made a difference. This should be explored together with as many those involved in all levels of the process as possible.
Public engagement in science and technology 
The movement for public engagement in science and technology grows out of a paradox: the steadily increasing number of ways citizens can learn about science has not always been matched by any increased level of scientific knowledge or sophistication among the citizenry. There are nearly one hundred science and technology museums in North America alone, countless blogs (one aggregation site, scienceblogs.com, reports 152 thousand posts and 3.3 million comments for just 61 blogs) and a proliferating number of science magazines. On the other hand, surveys of scientific literacy show a long term pattern in which Americans have only a moderate understanding of basic scientific facts and concepts. In 1992 only 59% of adults sampled could give correct answers to a series of scientific terms and concepts; in 2008 the number was 64%. Another survey found widening gaps in knowledge of nanotechnology between the most and least educated.
Because of this disconnect, there have been calls for new ways of connecting citizens with science in hopes that citizens can do more than respond passively to choices made by elites, and instead actually contribute to shaping science policy as it is made. Different mechanisms proposed for public engagement include such things as surveys, panels, public information programs, task forces, workshops, town meetings, and one-on-one interviews. Almost all of these involve some form of two-way exchange of ideas and information between elites involved in formulating a policy and noninvolved (but not necessarily nonengaged) citizens. Deliberative democracy, one of the best known of these, offers a structure for two-way communication about pending policy developments via public hearings, the mainstream media and the internet, consulting with different groups so policy in the making is informed by the knowledge and experiences of those who will be affected by it, working to engage the public before final decisions are made, and sometimes giving affected groups a share of power in policy developments.
Stages 1 and 2 can use such tools as public opinion surveys, media campaigns and public hearings. Stages 3 and 4 involve public or online deliberation or multi stakeholder negotiation aimed at consensus building. Government decision makers at the agencies involved are expected to know their objectives and rationales as well as key challenges to engaging the public.
In such situations, agencies must be on guard to see that all the important views are represented without raising expectations so high that all participants think their views will automatically be adopted as policy. Moreover, evaluation to ensure the effectiveness of public engagement is also important.
Key examples of public engagement include:
• Americans Discuss Social Security, which engaged 50,000 Americans in all fifty states over fifteen months in 1998 and 1999. During that period, President Clinton and 120 members of Congress took part in town meetings and teleconferences. The project’s sponsors state that it “demonstrated the intense public interest in the future of Social Security reform and showed that Americans had more of a “middle ground” approach than special interests or lawmakers had believed. For example, contrary to insiders’ expectations, participants overwhelmingly supported raising the cap on payroll taxes.” 
• Listening To The City, which brought 5,000 people from New York City and the tri-state area to the Javits Center in July 2002, to discuss the future of lower Manhattan. A separate series of 26 online dialogues involved an additional 800 participants over two weeks. The purpose was to insure broad participation in redevelopment of the World Trade Center site and listen to citizens’ ideas about the proposed memorial. According to the final report, 80% of participants were satisfied or very satisfied with the result.
• Voices & Choices, a 16-county civic engagement process aimed at involving citizens in the economic future of northeast Ohio in 2008. Major agenda items included school funding, government fragmentation and inefficiency, racial isolation and inequalities and creating a competitive workforce. The resulting meetings engaged 21,000 people. This included one-on-one interviews with three thousand people as well as eleven workshops attended by 15,000 more people. Nine hundred citizens took part in an additional town meeting aimed at identifying goals the region needed to adopt to overcome its most significant challenges. There were also leadership workshops for 1000 government and business leaders. The three top goals that emerged were planning for the future development and growth of the region, ensuring students have the financial resources they need to succeed, and improving workforce training programs. 90% of regional town meeting participants described them as excellent or good. (www.futurefundneo.org/~/media/Final_VoicesChoices_Report.ashx)
Public engagement with science was formally called for in the Third Report of the UK House of Lords Committee on Science and Technology, which argued that “public confidence in science and policy based on science has been eroded in recent years….there is a new humility on the part of science in the face of public attitudes, and a new assertiveness on the part of the public.” One consultation, on the regulation of biotechnology in 1998, involved six two-day workshops as well as a large-scale survey. Asked who should be involved in regulating biotechnology, between 40 and 50 percent of respondents said regulatory groups should include a mixed advisory body, an expert body, scientists themselves, the general public, government, and environmental groups. One advisor to the Office of Science and Technology said the process was time-consuming and expensive, and workshops were open to the charge of being run by their organizers rather than their participants, but he still felt the participants dealt with the issues and came to understand them.
Constraints of public meeting efforts 
The following intrinsic and extrinsic constraints of public meetings can lead to unexpected a misrepresentation of the overall public’s opinions:
1. Attendance in public meetings is low and highly selective
Although citizens express their intention to participate in public engagement activities, in real world, they are less likely to show up. For example, the average turnout at annual town meetings in Massachusetts in 1996 was 7.6 percent which was much lower than the average municipal election turnout of 31.1 percent. Low turnout rate in public meetings can lead serious sampling biases when attendees and non-attendees significantly differ in their interests. For example, attendees can be more interested in politics and involved in more personal discourses than non-attendees. In this case, their opinions can be slanted to one side.
2. Group dynamics and personality traits of participants
Depending the makeup of participants, group dynamics and personality characteristics of participants can considerably affect the outcomes of discussions. A small number of outspoken participants can make more than half of the comments during the discussions while least outspoken members make a very small portion of the comments.
3. Moderated/controlled settings of public meetings In order to minimize the potential effects of participants’ demographic and cognitive characteristics on conversations, public meetings or consensus conferences tend to be carefully moderated and guided by facilitators. In such artificial setting, participants may behave in different ways that may differ from what is likely to occur in real-world discussions.
4. Spillovers from public meetings to real-world discussion
The social implication effect of follow-up media coverage of public meetings or other engaging events may help transfer issues from these small group discussions to the broader community. However, in the case of the U.S., a spillover effect from public meetings into media discourse are minimal at best.
5. Knowledge gap issues
Public meetings and consensus conferences may create knowledge gaps between high SES and less SES participants. The demographic, prepositional and cognitive differences between two groups in public meeting may lead to differing outcomes of public engagement. For example, highly educated participants may learn more from discussions and dominate the conversation while less educated members listen to their arguments. Furthermore, only small proportions of the population who may be already informed attend public meetings while the majority of the population who may need information the most do not. In such case, any public engagement effort may widen existing gaps further.
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- Measham, T.G. Brake, L., Robinson C.J, Larson, S. Richards, C., Smith, T. (2011) NRM engagement between remote arid communities and government agencies: Success factors from Australia, Journal of Arid Environments, online: http://dx.doi.org/10.1016/j.jaridenv.2011.04.018
- There are a number of organizations, like California's Institute for Local Government, that provide public officials with analytic constructs to decide which approaches to use and evaluate the results. See, www.ca-ilg.org/publicengagement.
- ScienceBlogs. (n.d.). ScienceBlogs. Retrieved November 13, 2011, from http://scienceblogs.com/
- nsf.gov - S&E Indicators 2010 - Chapter 7. Science and Technology: Public Attitudes and Understanding - Public Knowledge About S&T - US National Science Foundation (NSF). (n.d.). nsf.gov - National Science Foundation - US National Science Foundation (NSF). Retrieved November 12, 2011, from http://www.nsf.gov/statistics/seind10/c7/c7s2.htm
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- Americans Discuss Social Security Â« AmericaSpeaks. (n.d.). AmericaSpeaks. Retrieved November 13, 2011, from http://asonline.org/americans-discuss-social-security/
- Listening to the City. (n.d.). Listening to the City. Retrieved November 12, 2011, from http://www.listeningtothecity.org
- Voices & choices Report On The Public's Priorities For Northeast Ohio's Future. (n.d.). www.voiceschoices.org. http://www.nsf.gov/statistics/seind10/c7/c7s2.htm
- Select Committee on Science and Technology Third Report CHAPTER 5: ENGAGING THE PUBLIC . (2010, April 1). www.parliament.uk . Retrieved November 12, 2011, from www.publications.parliament.uk/pa/ld199900/ldselect/ldsctech/38/3807.htm#a39
- de Santis, V. S., and T. Renner. 1997. Democratic traditions in New England town meetings: Myths and realities. In Annual Convention of the Midwest Political Science Association. Chicago, IL.
- Merkle, D. M. 1996. The polls‐Review‐The National Issues Convention Deliberative Poll. Public Opinion Quarterly 60 (4):588‐619.
- Scheufele, A. D. (2011). Modern Citizenship or Policy Dead End? Evaluating the need for public participation in science policy making, and why public meetings may not be the answer . Paper #R-34, Joan Shorenstein Center on the Press, Politics and Public Policy Research Paper Series. Havard University. Cambridge, MA. Retrieved from http://www.hks.harvard.edu/presspol/publications/papers/research_papers/r34_scheufele.pdf
- Dudo, A. D., S. Dunwoody, & D. A. Scheufele. (2011). The emergence of nano news: Tracking thematic trends and changes in U.S. newspaper coverage of nanotechnology. Journalism & Mass Communication Quarterly, 88(1), 55-75.
See also 
For examples of public engagement, see also: