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Analysis of Variance2
Effect Size2
Aptitude Treatment Interaction1
Computation1
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Educational and Psychological…2
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Thompson, Bruce2
Fidler, Fiona1
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ANOVA Versus Regression Analysis of ATI Designs: An Empirical Investigation.
Peer reviewed Peer reviewed
Thompson, Bruce – Educational and Psychological Measurement, 1986
This paper reports a Monte Carlo study of differences induced by different analysis choices over selected types of aptitude treatment interaction (ATI) data (nine combinations of three sample sizes and three population parameter effect sizes). Generally, ANOVA methods tended to overestimate smaller effect sizes and to underestimate larger effect…
Descriptors: Analysis of Variance, Aptitude Treatment Interaction, Effect Size, Monte Carlo Methods
Computing Correct Confidence Intervals for ANOVA Fixed- and Random-Effects Effect Sizes.
Peer reviewed Peer reviewed
Fidler, Fiona; Thompson, Bruce – Educational and Psychological Measurement, 2001
Illustrates the computation of confidence intervals for effect sizes for some analysis of variance applications and shows how the use of intervals involving noncentral distributions is made practical by new software. (SLD)
Descriptors: Analysis of Variance, Computation, Computer Software, Effect Size