What does the term "repeated measures" mean in the context of ANOVA?
I understand the distinction between within-subjects test and between-subjects test, but am not familiar with the term "repeated" in the following context: "ANOVA: Repeated Measures – between factors" and "ANOVA: Repeated Measures – within factors" (in G-Power 3).
Best Answer
Repeated measures means exactly the same thing as within subjects: it means that the same subjects were measured in several different conditions. In ANOVA terminology, these conditions form a repeated measures factor, or equivalently a within subjects factor. See wikipedia.
What I guess confused you is that in a repeated measures experiment one can still have between-subjects factors! For example, you can measure all subjects in several conditions (within-subject factor), but have several distinct groups of subjects (e.g. patients/controls, or males/females) -- this will be your between-subject factor.
I made a quick google search, and e.g. here all of that seems to be explained pretty clear, with a nice example.