POST HOC POWER ANALYSIS
成果类型：
Note
署名作者：
GILLETT, R
刊物名称：
JOURNAL OF APPLIED PSYCHOLOGY
ISSN/ISSBN：
0021-9010
DOI：
10.1037/0021-9010.79.5.783
发表日期：
1994
页码：
783-785
关键词：
摘要：
The objective of a post hoc review of statistical power is to determine the average power of tests used in a particular field. Because most theories in psychology are not sufficiently advanced to provide an exact prediction of effect size, post hoc reviews invariably calculate the power of a test in terms of the test's ability to detect the expected effects size as estimated from the data. However, to achieve their stated objective, such reviews should instead compute the expected power of a test over the range of likely effect sizes. That is, current practice commits the statistical error of confusing a function of an expectation with the expectation of a function. In consequence, post hoc power reviews overestimate the average power of statistical tests, often by a substantial margin.
来源URL：