Hegarty, M., Carpenter, P. A. & Just, M. A. (1991). Diagrams in the comprehension of scientific texts (641-668). In R. Barr, M. L. Kamil, P. Mosenthal & P. D. Pearson, P. D., Handbook of Reading Research, vol. 2. New York: Longman.

• The nature of diagrams and their relations to texts
• Relation between text and diagrams
• Comprehension of scientific texts accompanied by diagrams
• Empirical studies of processing test and diagrams