Suggests that instructional theory is possible, but it should concern itself only with narrowly circumscribed local instructional situations, relatively small chunks of curriculum for relatively small segments of the educational population. (Author/AM)

This report collects together three presentations given by the author at scientific and professional meetings during the Spring of 1977. The first discusses present views of the variety and complexity of individual differences among human beings in the context of current research on cognitive processing in learning and instruction. The second…

A vast literature in educational psychology attests to the fact that individual differences in learner aptitudes predict learning outcomes. A substantial body of literature also demonstrates that aptitude variables often interact with instructional treatment variables in these predictions. Aptitude main effects and aptitude-instructional treatment…