This article concerns work on strategies and procedures conducted by the Genevan school that remain largely unknown in the United States. Cellérier’s synthesis of Piaget’s structuralism and American functionalism is employed as a framework for classifying studies on how problems are understood, how goal-means structures are established, how control functions, and how affective factors come into play. Piagetian psychology and American cognitive science require one another if we are to have a complete theory of
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