Anyone who undertakes to bring about learning of a particular sort finds himself arranging a set of stimulus conditions that act upon the learner. In the simplest of cases, these stimuli may need to be made to occur only during a single brief period of time in order for the desired learning to take place. Far more frequently, however, the expected learning requires a stimulus situation that extends over a period ranging from seconds to minutes, even when one is dealing with a single learning objective. Since such durations are involved, the question of sequence naturally arises with respect to the arrangement of conditions for learning. What conditions need to occur first, what next, and what last in order for effective learning to be assured?The problem of arranging sequences of learning conditions, or, in other words, sequences of instruction, continues to be a topic of considerable importance for those who design and carry out instruction. In empirical research, the topic of this review has been capably addressed by several previous writers, sometimes in part and sometimes comprehensively. Interest in research related to instructional sequence continues to be reasonably high, and a substantial number of reports of empirical investigations has appeared from 1967 to the present.
STATEMENT OF THE PROBLEMBefore reviewing research studies and their results, it is necessary to make a somewhat detailed analysis of the problem of instructional sequence. This LEE S. SHULMAN, Michigan State University, was the editorial consultant for this chapter.