Outsider art is the work produced outside the mainstream of modern art by self-taught, untrained visionaries, spiritualists, recluses, folk artists, psychiatric patients, prisoners, and others beyond the imposed margins of society and the art market. Coined by Roger Cardinal in 1972, the term was intended as an English equivalent to Jean Dubuffet's "art brut"--literally "raw art," "uncooked" by culture, unaffected by fashion, unmoved by artistic...