Interaction analyses — Interpreting effect sizes (part 2)

[This was originally posted on my blog]

Edit 5/24/21: I’ve turned the code underlying these posts into an R package: https://dbaranger.github.io/InteractionPoweR. I’d recommend using this package for your own power analyses, rather than the original posted code, as it’s a lot easier to use, has more features, and I’ve fixed some minor errors.

In the previous post in this series I discussed how to compute power for an interaction (moderation) analysis. In writing that post, I realized that I didn’t have a…