Examines the issue of object sorting in early infancy. Forty-eight infants at 6, 9, and 12 months were presented with eight sets of small, manipulable objects. At six months, selective manipulation was absent; at nine months, 94 percent of the infants sequentially touched similar objects and at 12 months 100 percent did so. (Author/DB)

Results indicate that within the limitations of this study there is evidence that children with superior" intelligence showed more mature response patterns on Piaget-type tasks than children of the same age with average" intelligence test scores. (Author)