Recent research has shown that 2-year-olds fail at a task that ostensibly only requires the ability to understand that solid objects cannot pass through other solid objects. Two experiments were conducted in which 2- and 3-year-olds judged the stopping point of an object as it moved at varying speeds along a path and behind an occluder, stopping…

Experimental conditions consisting of visual experience, visual plus motor training, visual plus verbal-orienting instruction, visual plus motor plus verbal, and a control group were used to study young children's concept development. Assessment was based on discriminating and remembering positive concept instances and classifying concept…

Examined perception of object unity in partial occlusion in 72 infants. Recorded how long subjects looked at a display of complete and incomplete rods. In test and control conditions, infants looked longer at broken rods than at complete rods, suggesting that infants' cognitive, visual, or attentional skills may be insufficient to support…

Commercially available toys and games for children with educational handicaps, from general retardation to disabilities in limited areas of functioning are listed. For each toy, the name, manufacturer, and sex and age interest are stated; a description of the toy is given. All toys are classified according to the intellectual functions involved.…