«The written word is all that stands between memory and oblivion. Without books as our anchors, we are cast adrift, neither teaching nor learning. They are windows on the past, mirrors on the present, and prisms reflecting all possible futures. Books are lighthouses erected in the dark sea of time.»
Jeffery Robbins in «Gargoyles»
I usually recommend “R for Data Science” by Grolemund and Wickham (workflow, background, basics) and STHDA (great examples, esp. for visualization with ggplot). But when it comes to using R for statistical tests, yeah STHDA is also nice, but incomplete. R für Psychos (German site) fills a few gaps (and leaves out huge chunks), but still, there is more. Seems that gap was more than filled with the latest addition to the highly recommended list:
When it comes to statistics the website/book “Summary and Analysis of Extension Program Evaluation in R” by Salvatore S. Mangiafico is an excellent addition.
He deals with statistical tests, and as the title says, mostly for educational contexts. But the context really doesn’t matter — he delivers a practical and useful guide to doing lots of statistical tests with R (very useful for work in psychology or HCD). Just look at the sidebar on his website.
And he also has the whole material available as a freely available PDF book (on this page, just scroll down to the PDF link). Yeah.