ESTIMATION OF EFFECT SIZE FROM A SERIES OF INDEPENDENT EXPERIMENTS
ESTIMATION OF EFFECT SIZE FROM A SERIES OF INDEPENDENT EXPERIMENTS
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DOI：
10.1037/0033-2909.92.2.490
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发表时间：
1982-01-01
影响因子：
22.4
通讯作者：
HEDGES, LV
中科院分区：
文献类型：
--
作者：
HEDGES, LV
扩展统计理论的程序的基础上玻璃估计的影响大小的方法中使用的定量合成的研究。给出了效应量的一个无偏估计。一个加权估计的效果大小的基础上，从几个实验的数据被定义和证明是最佳的（渐近有效）。还给出了实验间效应量均匀性的近似（大样本）检验。实证抽样研究结果表明，当实验组和控制组的样本容量大于10，效应量小于1.5时，加权估计量和齐性统计量的大样本分布是相当准确的。(12参考）（PsycINFO数据库记录（c）2016阿帕，保留所有权利）
Extends statistical theory for procedures based on the Glass estimator of effect size for methods used in the quantitative synthesis of research. An unbiased estimator of effect size is given. A weighted estimator of effect size based on data from several experiments is defined and shown to be optimal (asymptotically efficient). An approximate (large-sample) test for homogeneity of effect size across experiments is also given. The results of an empirical sampling study show that the large-sample distributions of the weighted estimator and the homogeneity statistic are quite accurate when the experimental and control group sample sizes exceed 10 and the effect sizes are smaller than about 1.5.(12 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)