A measure of effect size for experimental designs with heterogeneous variances

被引:0
|
作者
Johnston, JE [1 ]
Berry, KJ [1 ]
Mielke, PW [1 ]
机构
[1] Colorado State Univ, Dept Sociol, Ft Collins, CO 80523 USA
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中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
A recent trend in the psychological literature has been to include measures of effect size when reporting probability values. The several measures of effect size associated with the Student t test for two independent samples are appropriate only when the variances are homogeneous. In this paper, commonly used measures of effect size are considered and compared, using four data sets. A chance-corrected measure of effect size is provided for two or more treatment groups characterized by either homogeneous or heterogeneous variances.
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页码:3 / 18
页数:16
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