Use of instructional material in the form of text, audio or visual guides to create a performance event where unrehearsed people perform the work. This can be done through various constellations of participation, eg. involving a solo audience creating a performance for itself, two audience members creating a performance for each other, a group involving collective participation, etc.
The unrehearsed performers can also be specifically invited or 'cast' individuals who perform in front of a conventional audience (the audience may or may not know the performers are unrehearsed.)
It can also be combined with rehearsed, predictable, or fixed elements (actors, the sunset, hungry birds, recorded material, etc).
This connection explores the difference between reading a play script, and a live performance where the reading out loud *is* the event - where people's efforts and the risks involved in getting involved are the point of the event: these may be referenced within the content (eg OK OK) or not (Your Words in my Mouth), but the fact is that the gap between the reader and that of the person whose words they are incorporating is never fully closed. The unrehearsed participant can never be a fully transparent 'servant' of the text.