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- Publisher
- American Psychological Association
- Copyright
- Copyright © 1993 American Psychological Association
- ISSN
- 0033-2909
- eISSN
- 1939-1455
- DOI
- 10.1037/0033-2909.114.3.510
- Publisher site
- See Article on Publisher Site
Abstract
The effect of outliers on reaction time analyses is evaluated. The first section assessesthe power of different methods of minimizing the effect of outliers on analysis of variance(ANOVA) and makes recommendations about the use of transformations and cutoffs. The secondsection examines the effect of outliers and cutoffs on different measures of location, spread,and shape and concludes using quantitative examples that robust measures are much less affectedby outliers and cutoffs than measures based on moments. The third section examines fittingexplicit distribution functions as a way of recovering means and standard deviations andconcludes that unless fitting the distribution function is used as a model of distributionshape, the method is probably not worth routine use.
Journal
Psychological Bulletin – American Psychological Association
Published: Nov 1, 1993