This small set of 3 titles, was first published in 1980 and 1987. The three volumes make important contributions to the study of cognitive process analyses of aptitude; learning and problem-solving; and conative and affective aspects of human performance, in coordination with cognitive psychology. Taken together the editors hoped they would provide at least one solid platform for a more comprehensive integration of cognitive, conative, and affective theory and research in the instructional psychology of the future.