The criterion validity of four subscales of the Psychosocial Maturity Inventory is investigated. The subscales are Work Orientation, Self-reliance, Social Commitment, and Tolerance. Teachers were asked to nominate the three students who were "most like" and the three students who were "least like" verbal descriptions of these traits. Their eleventh grade students took Form C of the Psychosocial Maturity Inventory. The results replicate previous findings that subscales of the Inventory discriminate students rated by teachers as highly mature from other students. The results extend earlier findings by showing that when a criterion group of reasonable size is obtained, three of the four subscales also discriminate students named as least mature from students not so designated. (Author/RC)