1. Interpersonal behavior changes perceived as accompanying the operant conditioning of verbal output in small groups;Aiken,1963
2. Group reinforcement of individual response experiments in verbal behavior;Bachrach,1961
3. Interaction process analysis: A method for the study of small groups;Bales,1950
4. The “reinforcement” of individual actions in a group situation;Hastorf,1964
5. The perception and evaluation of behavior change;Hastorf,1964