The purpose of this study is to report a behavioral observation validation of a multiple social interaction measurement instrument entitled the "Barclay Classroom Climate Inventory." This instrument measures social interaction in the elementary classroom as derived from self-report, peer judgments and teacher expectations. It provides an integrated need assessment system for use in diagnostic planning of curricular and behavioral interventions. In this study, an effort was made to relate psychometric variables to actual observed behavior in a number of classrooms of the Corpus Christi Public Schools over a ten-day period, with 700 elementary children as subjects of observation. (Author)