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Statistical Issues in Ecological Meta-Analyses

Jessica Gurevitch and Larry V. Hedges
Ecology
Vol. 80, No. 4 (Jun., 1999), pp. 1142-1149
Published by: Wiley
DOI: 10.2307/177061
Stable URL: http://www.jstor.org/stable/177061
Page Count: 8
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Statistical Issues in Ecological Meta-Analyses
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Abstract

Meta-analysis is the use of statistical methods to summarize research findings across studies. Special statistical methods are usually needed for meta-analysis, both because effect-size indexes are typically highly heteroscedastic and because it is desirable to be able to distinguish between-study variance from within-study sampling-error variance. We outline a number of considerations related to choosing methods for the meta-analysis of ecological data, including the choice of parametric vs. resampling methods, reasons for conducting weighted analyses where possible, and comparisons fixed vs. mixed models in categorical and regression-type analyses.

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