At school, pupils often cooperate on common projects and must coordinate their different individual actions. However, grades are pervasively used even in cooperative situations, which make the pupils' differences in achievement and their relative rank salient and may reduce their inclination to work constructively with others. Thus, we…

A study of 288 students with moderate to severe mental retardation investigated the relationship between curricular activities and problem behaviors. Findings indicated a positive correlation between ratings of curricular activities (based on activities being socially functional, peer referenced, and behaviorally functional) and students'…

This article discusses the successes of behavior analysts in affecting challenging behaviors in persons with developmental disabilities. Three future issues are then addressed: the development of challenging behaviors, the role of rule-governance in challenging behavior, and the behavior of persons who directly apply functional assessment and…

This study found that siblings (n=19) of severely autistic children, siblings of children with Down's syndrome, and siblings of normal children did not differ on measures of perceived self-competence or parents' report of social competence. Siblings of autistic children had more internalizing and externalizing behavior problems than siblings of…