4Liao, Y. Effects of hypermedia versus traditional instruction on students' achievement : a meta-analysis. Journal of Research on Computing in Education, 1998, 30(4): 341-360
5Najjar, L. J. Principles of educational multimedia user interface design. Human Factors, 1998,2: 311-319
6Mayer, R. E. & Moreno, R. Aids to computer-based multimedia learning. Learning and Instruction, 2002, 12: 107-119
7Mayer, R. E. Multimedia aids to problem-solving transfer.International Journal of Educational Research, 1999, 31: 611-623
8Schnotz, W. & Lowe, R. External and internal representations in multimedia learning. Learning and Instruction, 2003, 13 : 117-123
9Bannert, M. Managing cognitive load-recent trends in cognitive load theory. Learning and Instruction, 2002, 12: 139-146
10Kirschner, P. A. Cognitive load theory : implications of cognitive load theory on the design of learning. Learning and Instruction,2002, 12: 1-10