The peer interactions and cognitive levels of play of mildly developmentally delayed preschool children were compared as they participated in mainstreamed and specialized settings. They engaged in substantially higher rates of peer-related social behaviors and constructive play when mainstreamed. Factors affecting early childhood mainstreaming…

This study examined whether teacher-implemented classroom measurement procedures of short duration are as reliable as methods used in research studies to determine behavior state (e.g., awake active, awake inactive, asleep, drowsed) of six students with profound mental disabilities. Results indicated that more frequent but briefer measurements…

The problem of variability of data, even in presumable homogeneous subgroupings of handicapped children, which contaminates the results of many special education curriculum evaluation studies is examined with a study of 103 second-grade learning disabled students. The distortion of statistics calculated on samples of extreme variability; coupled…