Reports on four experiments on pattern perception in four-month-old infants. The first experiment examined preference for patterns varying in structure; the second examined encoding patterns from different subset sizes; and the last two experiments examined changes in the size, position, and orientation of the habituation pattern. (HOD)

Reports on three experiments involving 300 six-year old children that investigated the conditions under which young children would produce "separates" as opposed to partial occlusion drawings. (HOD)