For a population of 32 subjects (trainee teachers), using Tafoya's Motivation Game (preparation of a time capsule), the effect of positive and negative feedback on a number of personal and interpersonal variables was examined using repeated measures multivariate analysis of variance. The production of ideas decreased under both conditions, but more dis tinctly so under conditions ofpositive feedback. Increase in self-confidence and decrease in anxiety occurred under both conditions, but more markedly so under conditions of negative feedback.