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Standard cut-offs are not recommended when determining a suitable effect size for a power analysis. Indeed, the ‘meaningfulness’ of an …
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Shiny applications offer a fantastic way to produce interactive web applications. Unsurprisingly, there are abundant R packages built …
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Chi-square Chi-square tests are common in psychological science (Bakker & Wicherts, 2011). These tests compare the observed (i.e., …
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In an ideal world, a regression model’s predictors will be uncorrelated with each other or any other omitted predictor that is …
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Front Matter I remember hearing about the F-test during my third year undergraduate statistics class. I enjoyed statistics courses, …
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I vividly recall my first research methods and statistics course, which I took during the second year of my undergrad. I considered …
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I recently came across a Twitter poll that piqued my interest. The specific poll asked: Including non confounding covariates (Z) in …
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Main Github Page for Latest Updates Welcome to pIRRitchard! At the time of writing, I am involved on a project wherein we are …
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Primer on Statistical Significance Null-hypothesis significant testing (NHST) is a controversial approach to social science research. …
Last updated on 19 min read