Relative effectiveness of modeling and verbal instructions on severe retardates' gross motor performance.
D000293:Adolescent; D001521:Behavior Therapy; D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D007100:Imitative Behavior; D008297:Male; D009043:Motor Activity; D011187:Posture; D014705:Verbal Behavior