
This is a very lively performance convention entirely based on competitive improvisation, originated by Keith Johnstone. Theatresports consists of competitions mainly based on rehearsal exercises. They are a lot of fun and are very useful for developing quick thinking and confidence, as they require participants to take performance risks in public....
Found on
http://artspop.org.au/drama-drama_glossary/

Theatre sports is a form of improvisational theatre, which uses the format of a competition for dramatic effect. Opposing teams can perform scenes based on audience suggestions, with ratings by the audience or by a panel of judges. Developed by director Keith Johnstone in Calgary, Alberta, in 1977, the concept of Theatre sports originated in Johns...
Found on
http://en.wikipedia.org/wiki/Theatresports
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