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Omnibus Test for ANOVA #86
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Interesting read that paper.
While teaching, it is so strange for the students to always see that omnibus ANOVA within (multiple) linear regression, but with ANOVA, they only see it, when it is one-way. That makes no sense at all. Also, in an exploratory setting, testing main and interaction effects, could be considered post hoc. We could then provide a checkbox to apply the same corrections of "normal" post hoc tests for multiplicity of the family wise alpha error rate to the main and interaction effects. |
@EJWagenmakers such a fascinating topic (rant below as post-scriptum). I'm everything but a fan of P.S: |
@Joao-O-Santos This discussion is only about adding that omnibus test ALSO to the ANOVA module, to make tables / outputs more consistent across analyses. If I remember correctly SPSS avoided this problem, by forcing the user to do a multifactorial ANOVA in a General Linear Modeling module. The ANOVA was then limited to one factor. Do I remember correctly? |
For the classical ANOVA's, can we have an omnibus test please? For why we need it see
Cramer, A. O. J., van Ravenzwaaij, D., Matzke, D., Steingroever, H., Wetzels, R., Grasman, R. P. P. P., Waldorp, L. J., & Wagenmakers, E.-J. (2016). Hidden multiplicity in multiway ANOVA: Prevalence, consequences, and remedies. Psychonomic Bulletin & Review, 23, 640-647. (link on my webpage)
E.J.
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