An alternative explanation of the infant's difficulty in the stage III, IV, and V object-concept tasks.

Traditional explanations of the infant's difficulty in the stage III, IV, and V object-concept tasks have centered on the fact that the object is made to disappear. It is argued that this emphasis is mistaken. Two experiments are reported which demonstrate that infants continue to have difficulty in these tasks when tested with transparent occluders. The implications of these findings for alternative explanations of the infant's difficulty in the stage III, IV, and V tasks are considered.