The study explored behavioral procedures for developing the skill of standing from a chair for a severely mentally retarded 11-year-old nonambulatory girl and an 86-year-old man residing in a nursing home for the elderly. Functional assessment and programing determined the specific instructional needs of each S. A changing criterion design was…

This study explored developmental patterns in the acquisition of the gross motor skill of throwing among 110 educable, mentally retarded 7- to 12-year-olds. Each child was examined through cinematographic procedures to discover: a) variance in throwing patterns, b) elements composing throwing skills, and c) sequential integration of the elements…