Equivalence Testing for Psychological Research: A Tutorial

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Description: Psychologists must be able to test both for the presence of an effect and for the the absence of an effect. In addition to testing against zero, researchers can use the Two-One-Sided Tests (TOST) procedure to test for equivalence and reject the presence of a smallest effect size of interest (SESOI). TOST can be used to determine if an observed effect is surprisingly small, given that a true effect at least as large as the SESOI exists. We explain a range of approaches to determine the SESOI in psychological science, and provide detailed examples of how equivalence tests should be performed and reported. Equivalence tests are an important extension of statistical tools psychologist currently use, and enable researchers to falsify predictions about the presence, and declare the absence, of meaningful effects.

License: CC0 1.0 Universal

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Equivalence Testing - A Tutorial File system info In the GitHub storage you will find all the files required to reproduce our manuscript (the manuscript.Rmd file) in Rmarkdown. In each Example folder you can find easy-to-adapt versions of the TOST analysis conducted in R (.R), Jamovi (.omv), and a spreadsheet (.xlsx). For readers used to the SPSS interface, the analysis in Jamovi might be th...

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  • Equivalence Testing for Psychological Research: A Tutorial

    Psychologists must be able to test both for the presence of an effect and for the absence of an effect. In addition to testing against zero, researche...

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