In order to understand the advanced, scientific concepts of the various disciplines, students cannot rely on the simple memorization of facts. They must learn how to restructure their naive, intuitive theories based on everyday experience and lay culture. In other words, they must undergo profound conceptual change. This type of conceptual change…

A conceptualization of intentional behavior is presented stressing the problem of diagnosis. Methodological requirements for the study of intentional memory development are used in a selective review of the literature. (MS)