Samuels, S. J. (1970). Effects of pictures on learning to read, comprehension and attitudes. Review of Educational Research, 40(3), 397-407.

«Summary and conclusions.
1. The bulk of the research findings on the effect of pictures on acquisition of a sight-vocabulary was that pictures interfere with learning to read.
2. There was almost unanimous agreement that pictures, when used as adjuncts to the printed text, do not facilitate comprehension.
3. In the few studies done on attitudes, the consensus was that pictures can influence attitudes.» (p. 405)