Reviews "cognitive revolution" in psychology from historical, philosophical, and theoretical perspectives. Argues that various cognitive approaches to psychotherapy reflect two fundamental traditions in philosophy and psychological theory - rationalism and constructivism. Outlines key differences between rationalist and constructivist…

This commentary on C. Addison Stone's paper on the scaffolding metaphor for the learning disabilities field urges that all available literature, rather than a particular metaphor, should be used to evaluate the efficacy of instructional procedures in interpreting findings of instructional research. (Author/DB)