Findings suggest that semantic knowledge for concrete objects is represented and organized in similar ways in autistic, retarded, and normal children. Previous findings on cognitive deficits in autistic children are more likely related to their inability to use cognitive representations in an appropriate and flexible manner. (Author/RH)

Strategies young children used to correct errors in nesting seriated cups changed substantially with age, becoming increasingly more flexible and involving more extensive restructuring of the relationships among the cups. The same trend toward increasing flexibility of thought and action also appeared in procedures children used to combine the…

Preschool, second-, and sixth-grade children performed developmentally gradated, easy and difficult visual discrimination tasks in a quiet room or with one of two levels of extraneous auditory stimulation. Subjects' errors, response latencies, and glances away from the task were recorded. (Author/RH)

Tested the hypothesis that young children's tendency to draw horizontal or vertical objects perpendicularly to an oblique surface reflects their preference for perpendicular drawings as conceptually correct depictions. (Author/RH)