The effects of children's achievement orientations, sex of child, and sex of model were investigated on children's self-reward behavior. Achievement orientation was determined by performance on an embedded figures test; children then participated with an adult model in a bowling-game situation, during which the model used a low score as a criterion for selfreward while imposing a higher criterion on the child. High-achievementoriented girls set the highest self-reward standards, regardless of sex of the model. Both male and female subjects who had interacted with female models took fewer rewards than those who had played with male models. A control group of children that was not exposed to models took markedly more rewards than did the experimental subjects.Much of the recent work on the determinants of self-reinforcement behavior in children has concentrated on the role of imitation in the acquisition and modification of self-reward patterns (e.g., Bandura, Grusec, & Menlove, 1967;Bandura & Kupers, 1964;Bandura & Whalen, 1966). These investigations have isolated a variety of factors that affect this acquisition process, such as prior success and failure experiences, divergent modeling cues, and various characteristics of the model. However, little attention has been paid to the contribution of personality factors to differences in selfreward behavior.