Posts

2021

  • The right order of Method sections

    Method sections in academic (psychology) papers usually consist of the following sections: Participants, Design, Procedure, and Materials. They also tend to be presented in this order. But is this, generally speaking, the right order? I don’t think so. I think the proper order of Method sections is: Design Procedure Materials Data Analysis Participants Two things are notable here. One, there’s a Data Analysis section. Two, the Participants section is all the way at the end.

  • A tidystats example

    I illustrate how to use my tidystats software to analyze and report the results of a replication study that was part of the Many Labs 1 project.

2020

  • Why divide by N - 1 to calculate the variance of a sample?

    In a recent tweet I asked the question why we divide by minus 1 to calculate the variance of a sample. I received many responses, but many of them were exactly of the type I feared: a statistical-jargon response that confuses me more, rather than less. Some of the responses were very useful, though, enabling me to write up this post in which I describe my favorite way of looking at this issue.

  • Useful power analysis papers

    A curious thing happened in the field of social psychology: Social psychologists finally realized that statistical power is important. Unfortunately, they then skipped the step of figuring out how to do them correctly. Here I list some papers on power analyses that I hope help in improving the way we do them.

  • Understanding regression (Part 1)

    This is Part 1 of a series of blog posts on how to understand regression. The goal is to develop an intuitive understanding of the different components of regression. In this first post, we figure out where the estimate of an intercept-only regression model comes from.