New Methods for Comparing Groups : Strategies for Increasing the Probability of Detecting True Differences  

Oleh:

Wilcox, Rand R.

Jenis: Article from Journal - e-Journal
Dalam koleksi: Current Directions in Psychological Science vol. 14 no. 05 (Oct. 2005), page 272-275.
Topik: hypothesis testing; robust statistical methods; non-normality
Fulltext: 10. New Methods for Comparing Groups - Strategies for Increasing the Probability of Detecting True Differences.pdf (90.63KB)

Isi artikel

A commonly used method for comparing groups of individuals is the analysis of variance (ANOVA) F test. When the assumptions underlying the derivation of this test are true, its power, meaning its probability of detecting true differences among the groups, competes well with all other methods that might be used. But when these assumptions are false, its power can be relatively low. Many new statistical methods have been proposed—ones that are aimed at achieving about the same amount of power when the assumptions of the F test are true but which have the potential of high power in situations where the F test performs poorly. A brief summary of some relevant issues and recent developments is provided. Some related issues are discussed and implications for future research are described.

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