THE ADDITIVE EFFECTS OF DIFFERENCES IN CENTRAL TENDENCY AND VARIABILITY ARE IMPORTANT IN COMPARISONS BETWEEN GROUPS
THE ADDITIVE EFFECTS OF DIFFERENCES IN CENTRAL TENDENCY AND VARIABILITY ARE IMPORTANT IN COMPARISONS BETWEEN GROUPS
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DOI：
10.1037/0003-066x.50.1.5
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发表时间：
1995-01-01
影响因子：
16.4
通讯作者：
FEINGOLD, A
中科院分区：
文献类型：
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作者：
FEINGOLD, A
本文认为，两组之间的差异，在手段和方差必须一起检查，因为左和右尾比（表示组的差异，在低和高分的比例，分别）是不对称的分布时，在集中趋势和分散。这一点通过对能力倾向差异测试的尾部效应大小的分析得到了说明，该分析发现，性别差异以及这些差异的发展趋势通常在左尾与轻尾不同。集中趋势和变异性的群体差异的加性效应的影响进行了讨论的描述性分析和理论检验的初步研究和荟萃分析。
This article argues that the differences between 2 groups in means and variances must be examined together because left- and right-tail ratios (expressing group differences in proportions of low and high scores, respectively) are asymmetrical when distributions differ in both central tendency and dispersion. The point was illustrated by an analysis of tail effect sizes from the Differential Aptitude Tests, which found that sex differences-and the developmental trends in those differences were generally different at the left tail than at the light tail. The implications of the additive effects of group differences in central tendency and variability for both descriptive analyses and theory testing in primary research and meta-analysis are discussed.