The first experiment investigates the ability of children ranging in age from two to five years to use taxonomic and complementary organizational principles in a forced-choice picture recognition task. The second experiment assesses two alternative classes of cues which may have been used by 2-year-olds to mediate their recognition pairings. (RH)

Explores 96 preschool children's utilization of complementary and taxonomic relations under varying task demands. Results indicated that, as task demands increased, (1) complementary intrusions produced systematic error in the taxonomic condition and (2) performance decreased in both conditions. Complementary pairs were maintained at progressively…

One hundred students (ages 6-8) described similarities and differences among exemplars of different categories, identified the categories, and named the exemplars. Large performance differences were found between normally achieving and mildly retarded groups and between mildly retarded and learning-disabled groups, with small performance…

This study evaluated the diagnostic validity of a task measuring abstract categorization ability in learning disabled (LD) and non-LD children. Data showed that the component of abstract category knowledge that best disciminates LD children from non-LD, is the knowledge of how members of abstract categories differ from each other. (Author/JAZ)

Data are presented comparing children with learning disabilities to children with mild mental retardation, and comparing these two groups to normally achieving peers matched for chronological age (ages 6 to 8). Four studies were conducted, involving different types of oddity problems and rhyming skills. Results of the four studies indicated little…