Statistical issues in ecological meta-analyses

Citation
J. Gurevitch et Lv. Hedges, Statistical issues in ecological meta-analyses, ECOLOGY, 80(4), 1999, pp. 1142-1149
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ECOLOGY
ISSN journal
0012-9658 → ACNP
Volume
80
Issue
4
Year of publication
1999
Pages
1142 - 1149
Database
ISI
SICI code
0012-9658(199906)80:4<1142:SIIEM>2.0.ZU;2-A
Abstract
Meta-analysis is the use of statistical methods to summarize research findi ngs across studies. Special statistical methods are usually needed for meta -analysis, both because effect-size indexes are typically highly heterosced astic and because it is desirable to be able to distinguish between-study v ariance from within-study sampling-error variance. We outline a number of c onsiderations related to choosing methods for the meta-analysis of ecologic al 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.