This document consists of a series of papers which describe components of a systematic research and development program at the Center at Oregon for Research in the Behavioral Education of the Handicapped (CORBEH). The presentations focus upon: (1) the development and use of a social interaction recording system supplying the major dependent measures used for screening appropriate socially withdrawn and aggressive children and evaluating treatment variables; (2) comparative data on the efficacy of various treatment components tested in a tightly controlled experimental classroom and the less rigorous regular classroom setting; (3) followup data in the regular classroom for children previously placed in the experimental classroom setting; and (4) problems associated with the early identification of socially withdrawn children in preschool. Studies presented are: The Peer Interaction Recording System; Manipulating Peer Social Interactions Within an Experimental Classroom Setting; Normative Peer Interaction Rate as a Baseline for Followup Evaluation; Increasing Interactive Behavior of Withdrawn Children in the Regular Classroom; and Validating Teacher Selection with Normative Data for Preschool Social Interaction. (Author/MS)