Much interest currently exists in topics related to the improvement of learning through such avenues as "mathemagenic activities," and a considerable amount of research has been done recently in the area of visual cueing as a learning enhancement technique. This paper is restricted to a discussion of one visual cueing technique underlining and some implications arising from underlining research.
Schnell, T. R., & Rocchio, D. J. (1978). A Comparison of Underlying Strategies for Improving Reading Comprehension and Retention. Reading Horizons, 18 (2). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol18/iss2/4