Investigated whether young children (ages 2-5) could use spatial categorization as a mnemonic strategy. Three experiments found the children capable of spatially organizing objects as a strategy in the service of future retrieval. There were clear developmental trends in the deployment of categorization. (SKC)

The development of multiplicative classificatory skills in children between 4 and 9 years of age was investigated by means of two forms of the matrix-completion task. (Authors)

Comments on Moshman's discussion, in this issue, of reasoning as self-constrained thinking, arguing that differences in type of reasoning constraint probably reflect different knowledge bases but do not necessarily imply different processes. The fact that different tasks require different kinds of knowledge does not mean that different processes…

Proposes a theory of reasoning and outlines four general types of reasoning (case-based, law-based, coherence-based, and dialectical) based on the constraints the reasoning seeks to honor. The development of reasoning is presented as a continuing construction and reconstruction of self-constraints and justifications for those constraints,…

One hundred sixty sibling pairs from two child families were sampled for sibling interaction behaviors as they relate to measures of categorization style. The study provides additional evidence of the importance of a child's siblings to his cognitive development. (Editor/RK)