Examined Swedish children's inhibition behavior using mothers' and psychologists' ratings of inhibition at age 18 and 24 months to predict later ratings through age 16 years. Prediction was more reliable for children rated as very inhibited or very uninhibited than for those in nonextreme group through age six. Only for inhibited girls did early…

Individual differences in inhibition were moderately but significantly stable over the two years of the study. Compared to other children, inhibited children engaged in less high quality peer play at home and in day care, and were less able to play alone in the mother's absence. Other findings underscored the predictive and construct validity of…