Comparison of closed testing procedures for pairwise testing of means |
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Authors: | Ramsey Philip H |
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Affiliation: | Department of Psychology, Queens College of the City University of New York, Flushing, New York 11367-1597, USA. philip_ramsey@qc.edu |
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Abstract: | A Monte Carlo simulation was conducted to compare 9 pairwise multiple comparison procedures. Procedures were evaluated on the basis of any-pair power and all-pairs power. No procedure was found to be uniformly most powerful. A modification due to A. J. Hayter (1986) of Fisher's least significant difference was found to provide the best combination of ease of use and moderately high any-pair power in most cases. Pilot or exploratory studies can expect good power results with this relatively simple procedure. The greatest all-pairs power was usually provided by 1 of 2 partition-based versions of E. Peritz's (1970) procedure. Confirmatory studies will require such complex methods but may also need larger sample sizes than have been customary in psychological research. |
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