Examined evidence for transitions in first and second graders' analogical reasoning, over a six-month period. Found strong evidence for bimodality in test performance frequency distributions and weaker evidence for inaccessibility in frequency distributions. Transitional subjects showed a temporary increase of inconsistent solution behavior and…

The conceptualizations of morphogenic processes suggested by systems theorists provide a useful framework for describing growth and development in complex adaptive self-directing organisms. These processes involve changes in (1) a system's structure, state, or functioning; (2) discontinuities in development; and (3) at least two kinds of…

Expanded from its previous edition to include ages 13 and 14, this book provides teachers and parents with a quick reference on important childhood developmental issues, explaining what children should be learning and doing in the classroom at each developmental stage. The book begins by discussing how developmental issues can affect…