Abstract
This study tests the relative and combined merits of two behavior modification inputs for effecting predictable and productive task group behavior change. Two hundred and seventy-seven subjects, mostly between 20 and 27 years of age, acted in problem solving groups of five to seven members. Analysis of variance results indicate that video tape presentation of model groups and video tape feedback yield significant behavioral change. It is concluded that video tape feedback and modeling can be utilized in a constructively oriented behavior modification effort in a task group context.