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Hedges, Larry V.1
Vevea, Jack L.1
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Vevea, Jack L.; Hedges, Larry V. – Psychometrika, 1995
When the process of publication favors studies with small p-values and large effect estimates, combined estimates from many studies may be biased. This paper describes a model for estimation of effect size when there is selection based on one-tailed p-values. (SLD)
Descriptors: Bias, Effect Size, Equations (Mathematics), Estimation (Mathematics)