This study of the choice behavior of 14 adults with severe disabilities in residential programs found that 24 staff members correctly predicted the individuals' choices 78% of the time, when compared to choices made by the individuals themselves. (Author/DB)

A choice assessment was used to categorize reinforcers as high, middle, and low preference with 4 males (ages 7 to 19) with multiple disabilities including severe/profound mental retardation. High-preference stimuli consistently functioned as reinforcers for all subjects whereas low-preference stimuli did not function as reinforcers. (Author/DB)

The first of two studies with two adolescent students with serious emotional disturbances examined the interaction between unequal rates of reinforcement and equal versus unequal delays to reinforcer access on performance of math problems. The second study examined the interactive effects of reinforcer rate, quality, and delay. (Author/DB)

Examination of effects on 27 secondary students' Spanish vocabulary quiz performance of 2 variables (group versus individual study and group versus individual contingencies) found that, overall, group study was superior to individual study and, within the group study condition, group contingencies were superior to individual contingencies.…