Five adult males with profound retardation were assessed on a motor task during baseline, satiation, and deprivation conditions, with three classes of consequences: small food items, music, and social praise. Each stimulus class functioned as reinforcement, with different degrees of effectiveness during satiation versus deprivation conditions.…

The effects of reinforcement choice on task performance were examined with six individuals (ages 6-39) who had been diagnosed with severe to profound mental retardation. Findings indicated that access to choice did not improve the task performance of the subjects when highly preferred items were already incorporated into instructional programs.…

The use of primes (verbal suggestions), contingent attention, and training sessions to assess a 4-year-old child's engagement and skill in six large motor activities was examined using a combination reversal and multiple-baseline design. (Author/CL)