IntroductionThis study attempts to investigate the possibility of obtaining an increase in the perceptual differentiation skills of elementary education students with limited art backgrounds and experience. The instructional strategy under consideration compares various degrees of student involvement with a structured criticism model. A description of the relationships among the level of perceptual differentiation, the degree of involvement in structured critique sessions, and the utilization of compositional strategies in students' drawings is intended to provide information regarding the question of critical periods in perceptual development as posed by Eisner (1980, p. 598).This information should prove to be helpful in the development of curriculum for preparing elementary classroom teachers.