Participatory art is an approach to making art which engages public participation in the creative process, letting them become co-authors, editors, and observers of the work. This type of art is incomplete without viewers' physical interaction. It intends to challenge the dominant form of making art in the West, in which a small class of professional artists make the art while the public takes on the role of passive observer or consumer, i.e., buying the work of the professionals in the marketplace. Commended works by advocates who popularized participatory art include Augusto Boal in his Theater of the oppressed, as well as Allan Kaprow in happenings.
One of the earliest usages of the term appears in photographer Richard Ross (photographer)'s review for the Los Angeles Institute of Contemporary Art journal of the exhibition "Downtown Los Angeles Artists," organized by the Santa Barbara Contemporary Arts Forum in 1980. Describing in situ works by Jon Peterson (artist), Maura Sheehan and Judy Simonian anonymously placed around Santa Barbara, Ross wrote, "These artists bear the responsibility to the community. Their art is participatory."
Participatory art requires of the artist that they either not be present, or that they somehow are able to recede far enough to become equal with the participants. This is the only way that participants might be offered the agency of creation; without this detail, participants will always respond within the domain of authority of the artist; they will be subjugated in this way, and the work will fail to be participatory. This detail is centrally important in asserting Participation as a form in itself, and effectively differentiates Participation from interactive, community based art and socially engaged art. Any of these techniques can include the presence of the artist, as it will not impinge upon the outcome of the work in the same way.
There are various degrees of participation from nominal manipulation of an object like the wearable sculptures of Lygia Clark to the relinquishing of the artist's body to the whims of the audience in the 1974 performance Rhythm 0 by Marina Abramović. New media theorist Beryl Graham has compared the varying degrees of participation in the arts to the eight rungs of power described in Sherry Arnstein's "Ladder of Citizen Participation"—ranging from manipulation to token consulting, to complete citizen control. 
In the Fall/Winter issue of Oregon Humanities magazine, writer Eric Gold describes "an artistic tradition called 'social practice,' which refers to works of art in which the artist, audience, and their interactions with one another are the medium. While a painter uses pigment and canvas, and a sculptor wood or metal, the social practice artist often creates a scenario in which the audience is invited to participate. Although the results may be documented with photography, video, or otherwise, the artwork is really the interactions that emerge from the audience's engagement with the artist and the situation."
Participatory or interactive art creates a dynamic collaboration between the artist, the audience and their environment. Participatory art is not just something that you stand still and quietly look at–it is something you participate in. You touch it, smell it, write on it, talk to it, dance with it, play with it, learn from it. You co-create it.
It is important to point out that there has been some nominal obfuscation of Participatory Art, causing its appreciation as a distinct form to be stymied. It is most likely that this occurred simultaneously with the development of the term Relational Aesthetics by Bourriaud in the late 1990s. Some other art making techniques, such as 'community-based art', 'interactive art', or 'socially-engaged art' have been (mis)labelled as Participatory art, simply because the subtleties of distinction are not always clearly understood or cared about. Many forms of popular culture and media beyond visual art have grown increasingly participatory with the rise of the Internet and social media, which allow users to participate at a distance.
Janet Cardiff has created various audio tours that users experience by walking site-specific routes and listening to soundscapes composed by the artist.
Figment (arts event) is an annual showcase of participatory art in New York City.
Antony Gormley has involved the public in the creation of several works, most notably One & Other which invited hundreds of participants to occupy the vacant plinth in Trafalgar Square and perform or otherwise contribute to the work.
Allan Kaprow pioneered the field of participatory art with his Happening events staged in 1960's New York City, which used physical installations and prompts to facilitate aesthetic experiences for participants.
Learning to Love you More (2002–2009) was a work of Internet art by Miranda July and Harrell Fletcher that invited participants to submit responses to written prompts, and displayed an archive of the resulting works of conceptual art.
Adrian Piper led a series of events titled Funk Lessons (1982 –1984) that combined participatory dance-parties with conversations and lectures about African-American culture.
Public Art Stations (2013 - present) allow the public freedom in the creation of works, usually in watercolor.
Folk and tribal art can be considered to be a predecessor or model for contemporary "participatory art" in that many or all of the members of the society participate in the making of "art". However, the ideological issue of use arises at this point because art made in the institutions of art is by default, already part of the art world, and therefore it's perceived use is entirely different to any ritualistic or traditional practices expressed by folk or tribal groups. As the ethnomusicologist Bruno Nettl wrote, the tribal group "has no specialization or professionalization; its division of labor depends almost exclusively on sex and occasionally on age, and only rarely are certain individuals proficient in any technique to a distinctive degree ... the same songs are known by all the members of the group, and there is little specialization in composition, performance or instrument making.” 
Subtypes of participatory art
- Richard Ross."At Large In Santa Barbara." LAICA Journal. September–October 1980, Number 28. 45-47
- Mount, Andrew (2010). "Participation, Hosting And Mimesis: The Double Being".
- Graham, Beryl. "What kind of participative system? Critical Vocabularies from new media art". The 'do-it-yourself' artwork: Participation from Fluxus to New Media: 290.
- Nettl, Bruno, Music in Primitive Culture, Cambridge, Harvard 1956, p. 10.
- Claire Bishop (ed.), Participation: Documents of Contemporary Art, Whitechapel Gallery/The MIT Press, 2006.
- Robert Atkins, Rudolf Frieling, Boris Groys, Lev Manovich, The Art of Participation: 1950 to Now, Thames & Hudson, 2008.
- Anna Dezeuze (ed.), The 'Do-it-yourself' Artwork: Participation from Fluxus to New Media, Manchester University Press, 2010.
- Claire Bishop, Artificial Hells: Participatory Art and the Politics of Spectatorship, Verso Books, 2012.
- Kathryn Brown (ed.), Interactive Contemporary Art: Participation in Practice, I.B. Tauris, 2014.
- "What Is a Participatory Practice?" by David Goldenberg and Patricia Reed (interview)
- "Participatory Arts: The Stranger Brings a Gift" by Pia Moriarty (essay)
- "Participatory Art: A Paradigm Shift from Objects to Subjects" by Suzana Milevska (essay) 2006
- "Infelicitous Participatory Acts on the Neoliberal Stage" by Suzana Milevska (essay) 2016
- Bryant College Community/Performance Conference (2004)
- Oregon Humanities magazine, Fall/Winter 2008. (Discusses participatory art by Portland, Oregon artists including Harrell Fletcher, Julie Keefe, Sam Gould, Tiffany Lee Brown, M. K. Guth, Gary Wiseman, and M.O.S.T.)
- "Art Alienated: An Essay on the Decline of Participatory Art"
- Examples: : Flickr tags "participatory_art" - (may need Flickr account) community_art
- "Participation, Hosting And Mimesis: The Double Being" by Andrew Mount
- The Art of Taking Part: Participation at the Museum, ARKEN Bulletin, vol. 7, ed. Christian Gether, Ishøj : ARKEN Museum of Modern Art, 2017