Studies involving puzzle-solving in competitive, cooperative, and individual settings demonstrate that children's reactions to their own and other's success and failure are strongly influenced by the reward contingencies offered. Reward structures have different implications for children differing in self-concept level. Implications for the…

Summarized are three studies which used the Barclay Classroom Climate Inventory to measure the psychological and social-affective impact of six different classroom settings and a specific mainstreaming procedure on 240 educable mentally retarded and learning disabled pupils. Implications for mainstreaming and placement decisions are drawn. (SJL)