This site is a collection of notes on research methodology and statistics that I write for myself and share for anyone who is interested. They cover the things I run into in my own work: how to design a study, analyse data, and assess relevant literature (critically).
You can find more about me at willemsleegers.com.
Where it helps, I use R code, both to explain a topic and to show how to do something. I might run a simulation that makes an idea concrete or I might walk through the functions from an existing package that you can use yourself. A single page can work as an explanation and as a tutorial at the same time. The code that produces a result is shown next to it, so you can see exactly what it does.
The same goes for claims based on the scientific literature. When I summarise the literature or make a claim, I tie it to its source, and many citations include the exact passage they rest on, which you can read by clicking the citation. That way you can check what a claim is based on.
All pages on this site are a work in progress. I add to them and revise them as I learn, so some pages are further along than others. There's also a good chance I will get things wrong. If you spot a mistake or disagree with something, I would like to hear it: open an issue or get in touch.
For the mechanics of how pages here are written and formatted, see Formatting Features.