The present study demonstrated that complex "here-and-now" affective verbalizations, basic to most experiential or therapeutic groups, could be reliably induced in a group by simple reinforcement techniques. Further, reinforcement produced levels of performance equivalent to that induced by therapists. (Author)

The nature and development of interpersonal perceptions in a T group were studied. Results indicate that group members' perceptions are relatively complex and change markedly over sessions in ways consistent with current theories of group development. The analysis permits a first look at a T group free from biases. (Author)

The effects of two interdependent group contingencies, group-average and group-individual, on math performance and verbal interaction were investigated. In a group-average contingency the average performance of the members of the group must meet a set criterion level. In a group-individual contingency each member of the group must meet a set…