An automated training device was used in the differential reinforcement of an incompatible behavior in the treatment of hand mouthing of a boy with profound mental retardation and blindness. The presentation of music and vibration contingent upon bilateral hand-switch placement resulted in substantial and sustained reduction of hand mouthing with…

Single-subject multiple probe designs were employed in two studies with 5 young adults who had mental retardation and mental illness. After learning visual arts activity skills in Study 1 and personally expressive behaviors in Study 2, participants displayed improvement in behaviors associated with mental illness and increases in expressive…

Three profoundly retarded students (ages 6, 8, and 12) were taught prelanguage signalling behaviors (grasping the experimenter's finger and tapping the back of one hand with the other) to initiate co-active imitation behaviors with an adult. (JW)