1Eppler, M.J. & Burkard, R.A. Knowledge Visualization. Towards A New Discipline and Its Fields of Application, ICA Working Paper #2/2004[R].University of Lugano, Lugano,2004.
2Glass, G. V. Primary, Secondary and Meta-Analysis of Research[J].Educational Researcher, 1976, (5):3-8.
3Horton, P.B., McConney, A.A., Goallo, M., Woods, A.L., Senn, G.J., & Hamelin,D. n Investigation of the Effectiveness of Concept Mapping as an Instructional TOOl[J].Science Education, 1993,77 (1):95-111.
5Hedges, L. V. Statistical Considerations [A]. H. Cooper & L.V. Hedges (Eds.).The Handbook of Research Synthesis [M].New York: Russell Sage Foundation, 1994.29-38.
6Hedges, L. V. & Vevea, J. L. Fixed- and Random-Effects Models in Meta-Analysis[J].Psychological Methods, 1998, (3):486-504.
7Overton, R. C. A Comparison of Fixed-Effects and Mixed (Random-Effects)Models for Meta-Analysis Tests of Moderator Variable Effects[J].Psychological Methods, 1998 (3), 354-379.