3Levin, J. Anglin, G. and Carney, R. On Empirically Validating Functions of Pictures in Prose[A]. Houghton, H. and Willows, D. The Psychology of Illustration, volume 1: Basic Research [C]. New York~ Springer Verlag, 1987.
4Hunter, B., Crismore, A. & Pearson, P.D. Visual displays in basal readers and social studies textbooks [A]. Willows,D. M. ga Houghton,H. A. (Eds.). The psychology of illustration, Vol II[M]. NY: Springer-Verlag, 1987.
5Tang, Gloria M. Textbook illustrations: a cross-cultural study and its implications for teachers of language minority students[J]. The Journal of Educational Issues of Language Minority Students, 1994,13 :175-194.
6Mayer, R. E. Commentary comprehension of graphics in texts: An overview[J]. Learning and Instruction, 1993, 3:239-245.
7Paivio, A. Mental representation: A dual coding approach[M]. Oxford: Oxford University Press, 1986.
8Mayer, R. E. Multimedia learning: Are we asking the right questions [J]. Educational Psychologist, 1997, 32:1-19.
9lark, J. M. & Paivio, A. Dual coding theory and education[J]. Educational Psychology Review, 1991, 3:149-210.
10Baddeley, A. Working memory [J]. Science, 1992, 255:556-559.
