Statistical significance and effect size in education research: Two sides of a coin
Statistical significance and effect size in education research: Two sides of a coin
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DOI：
10.1080/00220670109598763
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发表时间：
2001-05-01
影响因子：
2.1
通讯作者：
Fan, XT
中科院分区：
文献类型：
--
作者：
Fan, XT
在教育研究中，统计显著性和效应量是一枚硬币的两面，它们相辅相成，但不能相互替代。良好的研究实践要求，为了做出合理的研究决策，应该考虑到两方面。在一项模拟研究中，检验了2种常用效应量测量（d和R-2）的抽样变异性。变异性表明，具有统计学意义的信息可能不具有实际意义，而具有实际意义的信息可能是抽样误差的结果，因而不可信。
In education research, statistical significance and effect size are 2 sides of 1 coin; they complement each other but they do not substitute for each other. Good research practice requires that, to make sound research decisions, both sides should be considered. In a simulation study, the sampling variability of 2 popular effect-size measures (d and R-2) was examined. The variability showed that what is statistically significant may not he practically meaningful, and what appears to be practically meaningful could have been the result of sampling error, thus not trustworthy, Some practical guidelines are suggested for combining the 2 sources of information in research practice.