The concept model addressed in this paper is the set of assumptions, data, and inferences used in the instructional design of concept learning. A new way of looking at concepts is presented that takes into account the declarative and metacognitive components of concept learning and use. Implications for instruction are outlined. The paper is…

Hypothesizes that the human brain localizes mental operations which are integrated in the performance of cognitive tasks such as reading. Provides support of this hypothesis from studies in neural imaging, mental imagery, timing, and memory. (RT)

Illustrates how one can discover structure in mental abilities where none was obvious. Reports that two classes of processes are used to form images. Indicates that imagery is carried out by multiple processes, not all of which are implemented equally effectively in the same part of the brain. (RT)