Abstract
This study compared the effects of modeling plus reinforcement (MR), reinforcement alone (R), and demand characteristics (D) on individual verbal output in a leaderless group discussion. Seventy-two male and female volunteers from undergraduate psychology courses (mean age 20.7 years) were assigned to three-person groups in the three conditions and participated in two 10 minute discussions. Ss who spoke the least in the first discussion were chosen as target persons (TPs). TPs in the R condition were reinforced for talking and punished for silence. TPs in the MR condition received the same treatment but were also exposed to a leadership modeling film. TPs in the D condition received no reinforcement, but were encouraged to become the group's leader. All conditions showed increases in verbral output, but the MR was superior to both the R (p less than .05) and D (p less than .01) conditions. The results were interpreted as consistent with Bandura's mediational theory of modeling.
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