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Understanding Interaction Effects and Type IV Errors.
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Dodds, Jeffrey – 1998
Aptitude-treatment interaction (ATI) studies have been used with some frequency, yet many researchers do not understand fully what interaction effects are. Because the means for interactions involve fewer persons per mean, power to detect interaction effects is typically smallest for the highest-order interaction in a given design. This phenomenon…
Descriptors: Analysis of Variance, Aptitude Treatment Interaction, Heuristics, Statistical Significance