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Larry Vernon Hedges is a researcher in statistical methods for meta-analysis and evaluation of education policy. He is Professor of Statistics and Education and Social Policy, Institute for Policy Research, Northwestern University. Previously, he was the Stella M. Rowley Distinguished Service Professor of Education, Sociology, Psychology, and Public Policy Studies at the University of Chicago. He is a member of the National Academy of Education and a fellow of the American Academy of Arts and Sciences, the American Educational Research Association, the American Psychological Association, and the American Statistical Association. In 2018, he received the Yidan Prize for Education Research, the world's most prestigious and largest education prize, i.e. USD four million.

He has authored a number of articles and books on statistical methods for meta-analysis, which is the use of statistical methods for combining results from different studies. He also suggested several estimators for effect sizes and derived their properties. He carried out research on the relation of resources available to schools and student achievement, most notably the relation between class size and achievement.

Hedges' g

In 1981, Hedges published a paper describing the unbiased standardized mean difference, the g statistic. "It turns out that d has a slight bias, tending to overestimate the absolute value of in small samples. This bias can be removed by a simple correction that yields an unbiased estimate of, with the unbiased estimate sometimes called Hedges’ g."

Bibliography

• Hedges, Larry V.; Olkin, Ingram (1985). Statistical methods for meta-analysis. Boston: Academic Press. ISBN 0-12-336380-2.
• Woodworth, George Walter; Hedges, Larry V.; Shymansky, James A. (1989). A practical guide to modern methods of meta-analysis. Arlington, VA: National Science Teachers Association. ISBN 0-87355-081-1.
• Hedges, Larry V.; Cooper, Harris M. (1994). The Handbook of research synthesis. New York: Russell Sage Foundation. ISBN 0-87154-226-9.
• Rothstein, Hannah; Borenstein, Michael; Hedges, Larry V. (2009). Introduction to Meta-Analysis (Statistics in Practice). New York: Wiley. ISBN 978-0-470-05724-7.

References

1. "Larry V. Hedges". Northwestern University. Retrieved May 6, 2013.
2. "Department of Statistics: Larry Hedges". Northwestern University. May 19, 2009. Retrieved May 16, 2010.
3. Sweet, Lynn (October 19, 2011), "Obama taps Northwestern U. prof Larry Hedges for education panel", Chicago Sun-Times.
4. "The official website of the Yidan Prize and Yidan Prize Foundation". Yidan Prize Foundation. Retrieved May 12, 2023.
5. Hedges, Larry V. (1981). "Distribution Theory for Glass's Estimator of Effect size and Related Estimators". Journal of Educational Statistics. 6 (2): 107–128. doi:10.3102/10769986006002107.
6. Borenstein, Michael, Larry V. Hedges, Julian P. T. Higgins, and Hannah R. Rothstein. 2009. Introduction to Meta-Analysis. Wiley. ISBN 9780470057247

External links

• Larry V. Hedges at the Mathematics Genealogy Project
• Larry V. Hedges publications indexed by Google Scholar

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