THESE PAPERS REPRESENT NOTES FOR THEORY SESSIONS PRESENTED AT VARIOUS TRAINING LABORATORIES AND ARE INTENDED AS HELPFUL TOOLS IN SUPPLEMENTING THEORY SESSIONS AND UNDERSTANDING VARIOUS LABORATORY EXPERIENCES. THE IDEAS AND CONCEPTS HAVE PROVED USEFUL IN NATIONAL TRAINING LABORATORIES OVER THE YEARS. CONDITIONS FOR LABORATORY LEARNING ARE SET FORTH. THE T GROUP, WHICH EMPLOYS INQUIRY, EXPLORATION, AND EXPERIMENTATION INTO ITS OWN ACTIVITIES TO IMPROVE UNDERSTANDING OF INDIVIDUAL AND GROUP BEHAVIOR, IS ANALYZED IN TERMS OF BASIC PSYCHOLOGICAL NEEDS AND INTERPERSONAL PROCESSES. EMOTIONAL PROBLEMS IN ORGANIZATIONS AND GROUPS ARE EXAMINED, TOGETHER WITH LEADERSHIP AND THE MANAGEMENT OF CONFLICT, INTERPERSONAL COMMUNICATION, DEFENSE MECHANISMS AND PERSONAL GROWTH, USEFUL CRITERIA FOR EVALUATING GROUP GROWTH, RELATIONSHIPS AND INTERACTION BETWEEN CLIENT AND CONSULTANT, PROCESSES OF SOCIAL INTERACTION AND CHANGE, AND STAGES IN PLANNING ORGANIZATIONAL CHANGE. SKILLS ARE INDICATED FOR STIMULATING CHANGE IN PERFORMANCE, ATTITUDES, AND UNDERSTANDINGS OF AN INDIVIDUAL, GROUP, ORGANIZATION, OR COMMUNITY. THE DOCUMENT NOTES PURPOSES AND PERSONNEL OF THE "JOURNAL OF APPLIED BEHAVIORAL SCIENCE," LISTS NATIONAL TRAINING BOARD MEMBERS (MAY 1966), AND PROVIDES READING LISTS. (LY)