Larry Hedges Department Chair; MS Program Director; Board of Trustees Professor of Statistics

Research Interests

My research interests are in the development and application of statistical methods for the social, medical, and biological sciences. One major interest is the combination of results across studies to draw general conclusions (meta-analysis). Another major area of research is the design and analysis of social experiments. I work on the development of statistical methods in both of these areas and their application to policy research, particularly education policy. I also work on the role of uncertainty in cognitive science, trying to understand how human cognition is shaped by the fact that it involves processing of information memory and perception that is inherently uncertain. Some of this work on cognition is supported by the National Science Foundation under a grant for the Spatial Intelligence Learning Center (at Northwestern University, the University of Chicago, and Temple University). Finally, I work on the demography of human abilities, including the understanding of differences between social groups and variation of abilities and measured achievement. My work is support by twelve active grants from the National Science Foundation, the US Institute of Education Sciences, the National Institute of General Medical Sciences, and the Spencer Foundation.


Hedges, L. V. & Olkin, I. (1985). Statistical Methods for Meta-Analysis . New York : Academic Press.

Hedges, L. V., Shymansky, J. A., & Woodworth, G. (1989). A Practical Guide to Modern Methods of Meta-Analysis . Washington , D.C. : National Science Teachers Association.

Cook, T., Cooper, H. M., Cordray, D., Hedges, L. V., Light, R. J., Louis, T., & Mosteller, F. (1991). Meta-Analysis for Explanation . New York : The Russell Sage Foundation.

Draper, D., Gaver, D. P., Goel, P. K., Greenhouse, J. B., Hedges, L. V., Morris, C. N., Tucker, J. R., & Waternaux, C. (1993). Combining Information: Statistical Issues and Opportunities for Research . Washington , D.C. : American Statistical Association.

Cooper, H. M. & Hedges, L. V. (Eds.) (1994). The Handbook of Research Synthesis . New York : The Russell Sage Foundation.

Hedges, L. V. & Schneider, B. (Eds.) (2005). The Social Organization of Schooling . New York : The Russell Sage Foundation.

Cooper, H. M., Hedges, L. V., & Valentine, J. (Eds.) (2009). The Handbook of Research Synthesis and meta-analysis (2nd Edition). New York: The Russell Sage Foundation. 

Borenstein, M., Hedges, L. V., Higgins, J. P. T., & Rothstein, H. R. (2009).Introduction to meta-analysis. London: John Wiley.