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)

Two social psychological theories--similarity theory and equity theory--are employed to elucidate the relationship between group members' abilities and group performance on tasks involving high levels of interdependence. Contrasting hypotheses are drawn regarding specific ability compositions that should evoke performance above or below the simple…

In a study to assess young children's social interaction with peers, six male toddlers who were the only participants in a playgroup were observed in two situations: (1) a GROUP situation in which at least four of the boys were present and (2) a DYAD situation in which only two boys were present. Both types of observations were made at 16, 19, and…