The results showed that the performance of the autistic children was better than the other two groups on concrete discrimination tasks, was poorer than the other two groups on formal discrimination tasks, and the quality of the autistic children's performance decreased as task requirements for formal discrimination increased. (Author/SB)

A group of 76 male and female toddlers identified drawings depicting boys and girls alone or with sex-typical or sex-atypical toys by responding "girl" or "boy,""girls' toy" or "boys' toy." The youngest girls outperformed the youngest boys in identifying toys. Otherwise, responses in general improved with…

Looking times of 36 children were recorded during subject-controlled presentation of slides in order to determine whether the existence of simple categories in 3-year-olds can be inferred from habituation data, and to determine any sex differences in conceptual generalization of habituation. Habituation was demonstrated over repeated presentation…

For this study, the second in the cross sectional series, based on the Conceptual Learning and Development (CLD) model, assessment batteries were developed to determine each child's level of attainment and related use of the concepts "equilateral triangle,""cutting tool,""noun," and "tree." Batteries were…

For this study, the second in the cross sectional series, based on the Conceptual Learning and Development (CLD) model, assessment batteries were developed to determine each child's level of concept attainment and also the related use of the concepts "equilateral triangle,""cutting tool,""noun," and "tree."…