ERIC Number: EJ1118669
Record Type: Journal
Publication Date: 2017
Abstractor: As Provided
Reference Count: 14
More Powerful Tests of Simple Interaction Contrasts in the Two-Way Factorial Design
Hancock, Gregory R.; McNeish, Daniel M.
Journal of Experimental Education, v85 n1 p24-35 2017
For the two-way factorial design in analysis of variance, the current article explicates and compares three methods for controlling the Type I error rate for all possible simple interaction contrasts following a statistically significant interaction, including a proposed modification to the Bonferroni procedure that increases the power of statistical tests for deconstructing interaction effects when they are of primary substantive interest. Results indicate the general superiority of the modified Bonferroni procedure over Scheffé and Roy-type procedures, where the Bonferroni and Scheffé procedures have been modified to accommodate the logical implications of a false omnibus interaction null hypothesis. An applied example is provided and considerations for applied researchers are offered.
Descriptors: Statistical Analysis, Hypothesis Testing, Comparative Analysis, Statistical Significance
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A