Piaget's ideas are discussed: that the basic thrust of education is determined by the intellectual development of the child, that the child's intelligence develops in definite stages, and that the goal of the developmental process is to reason in logical terms. (MLW)

Examines the CDI-WORDS Short Form vocabulary checklist as an index of language production. The study focuses on the associations between this short form and directly observed measures of lexical production; the associations between short-form checklists administered at different ages; the predictive associations between short form scores and…