1. Effects of group pressure upon the modification and distortion of judgments;Ash,1951
2. Principles of behavior modification;Bandura,1969
3. Group psychotherapy research variables;Bednar;International Journal of Group Psychotherapy,1970
4. Operant conditioning in group psychotherapy with children;Clement;Journal of School Health,1968
5. Group play therapy and tangible reinforcers used to modify the behavior of eight-year-old boys;Clement,1967