“…A "helper-therapy principle" (Riessman, 1965), which assumes that the helper benefits from the helping process, has been applied by organizations such as Alcoholics Anonymous and has long been used in peer tutoring (e.g., Harris & Sherman, 1973). More recently, the principle has been extended to the use of retardates as behavior modifiers or observers (Craighead, Mercatoris, & Bellack, 1974;Whalen & Henker, 1969, 1971a, 1971b; to token economies (Kale, Zlutnick, & Hopkins, 1970;Phillips, Phillips, Wolf, & Fixsen, 1973;Pomerleau, Bobrove, & Harris, 1972); to transitional programs from the institution to noninstitutional living (Fairweather, Sanders, Maynard, & Cressler, 1969); and in community programs utilizing indigenous help-givers (e.g. Klein, 1967).…”