Effects of a differential reinforcement of other behavior procedures (DRO) on the stereotypic responses and task performance of three autistic youth during dyadic instruction were examined. The procedures effectively reduced the stereotypic behavior of two children and substantially increased the task performance of the two lowest performance…

Mildly mentally retarded adults (N=144) were classified as either relatively task intrinsically motivated or task extrinsically motivated and were assigned to behavior regulation conditions. Across conditions, intrinsically motivated Ss worked harder than extrinsically motivated Ss; all worked harder under conditions of regulation of reinforcement…

The performance of 80 mildly mentally retarded and 133 nonretarded children (102-177 months old) were compared on a rotary pursuit task to determine whether augmentation of response-produced feedback by supplementary sensory feedback would facilitate skill acquisition. (Author/SW)

A report of the construction and analysis of a forced choice measure of performance behavior effectiveness of attendants in hospitals for the mentally retarded was made. (Author)

The ability of moderately mentally retarded children who received training on the relational concept of "between" to set self-performance standards was investigated with 14 Ss (mean age 11 years). Results indicated that the Ss learned concepts that allowed them to set appropriate or realistic self-performance standards. (Author/SW)

Nine institutionalized educable retarded children (mean age 12 years) and nine nonretarded children matched for chronological age were tested on a visual backward masking task. (Author)

A group of 31 institutionalized retarded adolescents responded to 18 conservation of number tasks. (Author)

The effects of providing educable mentally handicapped students with the opportunity for isolated study were examined. (Author)

Investigated was whether the value of an event influences a subject's guess that the event will occur. (KW)