“…A large and rapidly expanding literature (McAleese & Unwin, 1973) generally testifies that specifiable behaviors which are under the subject's voluntary control can be changed by microteaching (Allen, 1967;Allen & Ryan, 1969;Cotrell & Doty, 1971b;Perlberg, Peri et al, 1971) and that microteaching produced higher teaching effectiveness ratings than an observation-aide program (Allen & Fortune, 1966). A large and rapidly expanding literature (McAleese & Unwin, 1973) generally testifies that specifiable behaviors which are under the subject's voluntary control can be changed by microteaching (Allen, 1967;Allen & Ryan, 1969;Cotrell & Doty, 1971b;Perlberg, Peri et al, 1971) and that microteaching produced higher teaching effectiveness ratings than an observation-aide program (Allen & Fortune, 1966).…”