Lemonnier Schallert, D. (1980). The role of illustrations in reading comprehension. In: R. J. Spiro, B. C. Bruce & W. F. Brewer (Eds.), Theoretical Issues in Reading Comprehension, 503 - 524. Hillsdale, NY: Lawrence Erlbaum.

"The purpose of this review is to delineate when it is that a picture is worth a thousand words. In investigating the role of illustrations in reading comprehension, reviewers and researchers alike have come up with seemingly contradictory conclusions. Some have found that pictures facilitate the comprehension and retention of text whereas others have found that pictures either make no difference or actually interfere with reading. Throughout this chapter, I will examine the evidence for and against pictures with the purpose of determining why it is and when it is that pictures have an effect on comprehension." (p. 503 - 504)