Play is an amusing interaction with people, animals, or things. Play may involve pretend or imaginary interpersonal and intrapersonal interactions or interplay. The rites of play are evident throughout nature and are perceived in people and animals, particularly in the cognitive development and socialization of children. Play often involves props, animals, or toys in the contexts of learning and recreation. Some play has clearly defined goals, and when structured with rules is entitled a game. Other forms of play exhibit neither goals nor rules and are considered to be "unstructured."
Johan Huizinga gave an extensive analysis of play in his Homo Ludens and explained how diverse human cultural activities, from religious rituals to arts and sciences, emerged out of play or at least had the element of play at their basis. He defined the human being as "Homo ludens" (man the player) as opposed to "Homo sapience" (man the wise) to express the essential role of play in human existence. Play is associated with other key components of human existence such as freedom, joy, happiness, and Flow (psychology).
As a theoretical concept, play is challenging to define. Rather than collapsing all views of play into a singular definition, play may be best envisioned as descriptive of a range of activities that may be ascribed to humans and non-humans. In general discourse, people use the word "play" as a contrast to other parts of their lives: sleep, eating, washing, work, rituals, etc. Different types of specialists may also use the word "play" in different ways. Play therapists evoke the expansive definition of the term in Play Therapy and Sandbox Play. Play is cast in the modal of Sacred Play within Transpersonal Psychology.
The seminal text in play studies is Homo Ludens by Johan Huizinga. This work popularized the notion of the Magic Circle as a conceptual space in which play occurs. That is, the state in which the various actions in play have meaning e.g. kicking (and only kicking) a ball in one direction or another, using physical force to impede another player (in a way which might be illegal outside the context of the game).
Another classic in play theory is Man, Play and Games by Roger Caillois. This work extends and in large parts disputes the theories put forward by Huizinga.
A notable contemporary play theorist is Jesper Juul who works on both pure play theory and the application of this theory to Computer game studies. The theory of play and its relationship with rules and game design is also extensively discussed by Katie Salen and Eric Zimmerman in their book, Rules of Play: Game Design Fundamentals.
In computer games the word gameplay is often used to describe the concept of play.
Johan Huizinga's Homo Ludens
Homo Ludens, or "Man the Player," is a book written in 1938 by Dutch historian, cultural theorist and professor Johan Huizinga. It discusses the importance of the play element of culture and society. Huizinga makes it clear in the forward of his book that he means the play element of culture, and not the play element in culture. However, the uncredited English translator of the Beacon Books version modified the subtitle of the book to contradict Huizinga's stated intention. The version in print, which is widely available, in English is a translation and synthesis of the original Dutch and the first English translation (done by Huizinga himself), because "a comparison of the two texts shows a number of discrepancies and a marked difference in style" (Translators Note, unnumbered page). Huizinga uses the term "Play Theory" within the book to define the conceptual space in which play occurs. Huizinga suggests that play is primary to and a necessary (though not sufficient) condition of the generation of culture.
Childhood and play
Playing has been long recognized as a critical aspect of Child development. Some of the earliest studies of play started in the 1890s with G. Stanley Hall, the father of the child study movement that sparked an interest in the developmental, mental and behavioral world of babies and children. The American Academy of Pediatrics (AAP) published a study in 2006 entitled: "The Importance of Play in Promoting Healthy Child Development and Maintaining Strong Parent-Child Bonds." The report states: "free and unstructured play is healthy and—in fact—essential for helping children reach important social, emotional, and cognitive developmental milestones as well as helping them manage stress and become resilient" 
Play is explicitly recognized in Article 31 of The Convention on the Rights of the Child (adopted by the General Assembly of the United Nations, November 29, 1989), which states:
- Parties recognize the right of the child to rest and leisure, to engage in play and recreational activities appropriate to the age of the child and to participate freely in cultural life and the arts.
- Parties shall respect and promote the right of the child to participate fully in cultural and artistic life and shall encourage the provision of appropriate and equal opportunities for cultural, artistic, recreational and leisure activities.
Childhood 'play' is also seen by Sally Jenkinson (author of The Genius of Play) to be an intimate and integral part of childhood development. "In giving primacy to adult knowledge, to our 'grown-up' ways of seeing the world, have we forgotten how to value other kinds of wisdom? Do we still care about the small secret corners of children's wisdom?"
Modern research in the field of 'affective neuroscience' has uncovered important links between role playing and neurogenesis in the brain. (Panksepp, Affective Neuroscience 98). Sociologist Roger Caillois coined the phrase ilinx to describe the momentary disruption of perception that comes from forms of physical play that disorient the senses, especially balance.
In addition evolutionary psychologists have begun to expound the phylogenetic relationship between higher intelligence in humans and its relationship to play.
Perhaps the most progressive research on play has come from Stuart Brown, MD and the National Institute for Play.
Stevanne Auerbach mentions the role of play therapy in treating children suffering from trauma, emotional issues, and other problems. She also emphasizes the importance of toys with high play value for child development and the role of the parent in evaluating toys and being the child's play guide.
People at the National Institute for Play are creating a clinical, scientific framework for play. On their website they introduce seven patterns of play (along with reference sources for each) which indicate the huge range of types of activities and states of being which play encompasses.
In animal behavior
Play is an important part of learning in many animals, though it is generally only seen in those with highly complex nervous systems such as mammals and birds. Infants experiment with adult behaviors including fighting to learn how to survive. Predators such as lions and bears play by chasing, pouncing, pawing, wrestling, and biting, as they learn to stalk and kill prey. Prey animals such as deer and zebras play by running and leaping as they acquire speed and agility. Hoofed mammals also practice kicking their hind legs to learn warding off attacks. While mimicking adult behavior, attacking actions such as kicking and biting are not completely fulfilled so that they won't injure each other. In social animals, playing might also help to establish dominance rankings among the young to avoid conflicts as adults.
Play however has traditionally been given little attention by behavioral ecologists. Edward O. Wilson wrote in Sociobiology that "No behavior has proved more ill-defined, elusive, controversial and even unfashionable than play". Though it received little attention in the early decades of æthology, there is now a considerable body of scientific literature resulting from research on the subject. Play does not have the central theoretical framework that exists in other areas of biology. Play may be divided into three general categories: Social play, locomotor play and object play.
- ↑ Ginsburg, Clinical Report, Digital object identifier (DOI): 10.1542/peds.2006-2697
- ↑ Jenkinson, Sally (2001). The Genius of Play: Celebrating the Spirit of Childhood. Melbourne: Hawthorn Press. ISBN 1-903458-04-8.
- ↑ Auerbach, S. (2004). Dr. Toy's smart play smart toys how to raise a child with a high PQ (play quotient). Rancho Dominguez, CA: Educational Insights. ISBN 1-56767-652-9
- ↑ Alex Hawes. Jungle Gyms: The Evolution of Animal Play. Retrieved January 3, 2008.
- ↑ Wilson, E. O. (1975) Sociobiology: The New Synthesis Cambridge, M.A. Harvard University Press.
- Auerbach, S. 2004. Dr. Toy's smart play smart toys how to raise a child with a high PQ (play quotient). Rancho Dominguez, CA: Educational Insights. ISBN 1-56767-652-9
- Caillois, R. 2001. Man, play, and games. Urbana and Chicago, University of Illinois Press (originally published in 1958; translated from the French by Meyer Barash). ISBN 025207033X
- Huizinga, J. 1955. Homo ludens; a study of the play-element in culture. Boston, Beacon Press.
- Jenkinson, Sally. 2001. The Genius of Play. Hawthorn Press. ISBN 1903458048
- Sutton-Smith, B. 1997. The ambiguity of play. Cambridge, Mass., Harvard University Press. ISBN 0674017331
- Wilson, E. O. 1975. Sociobiology: The New Synthesis Cambridge, M.A. Harvard University Press. ISBN 9780674816213
- National Institute for Play Retrieved January 3, 2008.
- Gordon M. Burghardt. The Genesis of Animal Play: Testing the Limits Retrieved January 3, 2008.
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