INVESTIGATED WERE THE RELATIONSHIPS BETWEEN ELEMENTS OF THE SECONDARY SCHOOL PLANT AND CERTAIN CHARACTERISTIC BEHAVIORS OF THE STUDENTS, TEACHERS, AND ADMINISTRATORS IN THESE BUILDINGS. THE PROBLEMS WERE WHETHER THE BUILDING DESIGN AND UTILIZATION HAD ANY INFLUENCE ON THE INTERACTION OF SCHOOL PERSONNEL AND WHETHER THE BUILDING DESIGN AND UTILIZATION HAD ANY INFLUENCE ON THE ATTITUDES OF SCHOOL PERSONNEL TOWARD THEMSELVES AND OTHERS OR TOWARD THE SCHOOL AND ITS ARCHITECTURE. THE RELATIONSHIP BETWEEN FOUR BUILDING FACTORS AND SEVEN FACTORS OF PERSONNEL INTERACTION AND ATTITUDES WAS EXAMINED. THIRTY-FOUR CONTEMPORARY SECONDARY SCHOOLS WERE USED. THE FOUR BUILDING FACTORS WERE SIZE, DESIGN, UTILIZATION, AND TYPE. THE SEVEN PERSONNEL FACTORS INCLUDED--FREQUENCY AND PATTERNS OF INTERACTION, ATTITUDES TOWARD SELF, SCHOOL, AND ARCHITECTURE, PROBLEMS PERCEIVED BY SCHOOL PERSONNEL, AND EFFICACY OF PERSONNEL INTERACTION. RESULTS SHOWED THAT THE "SIZE" OF THE SCHOOL WAS THE SINGLE DOMINANT FACTOR REGARDING SCHOOL PERSONNEL INTERACTION AND ATTITUDES. HOWEVER THE INFLUENCE OF SCHOOL SIZE COULD BE MODIFIED BY THE RELATED BUILDING FACTORS OF DESIGN AND UTILIZATION.