A RESEARCH STUDY CONDUCTED BY THE SMALL AIRCRAFT ENGINE DEPARTMENT OF GENERAL ELECTRIC AND BOSTON UNIVERSITY HUMAN RELATIONS CENTER EXPLORED THE PERSONAL CHARACTERISTICS OF 47 T-GROUP PARTICIPANTS. IN PART 1, THE AUTHORS DISCUSS THE PREDICTOR MEASURES THAT WERE FORMED BEFORE TRAINING. AT THE END OF EACH LABORATORY EACH MEMBER AND THE TRAINERS RATED EVERY OTHER MEMBER ON GROUP BEHAVIOR. THE RELATIONSHIPS BETWEEN PREDICTOR SCORES AND BEHAVIOR MEASURES AND THE CHARACTERISTICS OF T-GROUP CONTRIBUTORS ARE DESCRIBED. IN PART 2, THE AUTHORS DISCUSS CHANGES IN ORGANIZATIONAL BEHAVIOR AS MEASURED BY ORGANIZATIONAL BEHAVIOR DESCRIPTION SURVEYS MADE OF EACH PARTICIPANT BY A SUPERIOR, A PEER, AND A SUBORDINATE BEFORE AND 6 TO 8 WEEKS AFTER TRAINING. THE AUTHORS CONCLUDED THAT PARTICIPANTS BECAME MORE EMOTIONALLY EXPRESSIVE AND SOME BECAME MORE OPEN. PERSONS WHOSE BASIC INTERPERSONAL STYLE IS OPEN PROFITED MOST FROM LABORATORY TRAINING, BUT THE DEVELOPMENT OF TRAINING PROGRAMS FOR PEOPLE WHOSE INTERPERSONAL STYLE IS CLOSED WAS RECOMMENDED. A CONCEPTUAL FRAMEWORK FOR RESEARCH AND BRIEF DESCRIPTIONS OF RESEARCH INSTRUMENTS ARE INCLUDED. (AJ)