ABSTRACT
In chapters 3 through 5, the analysis of completely randomized (or between-subjects) ANOVAs was examined, first when there was only one factor (chap. 3), then when there were two (chap. 4) or three or more (chap. 5) factors. Beginning in this chapter, the commands to conduct within-subjects or repeated measures ANOVAs (also called correlated measures designs) are covered. The most common example for this kind of data arises when each participant gets each of the treatments or conditions of the independent variable(s) or levels of the factor(s). In contrast, in the between-subjects designs examined earlier, each participant received one and only one of the conditions. As was done for the earlier designs, the simplest version (i.e., only one within-subjects factor) is presented first, in this chapter, followed by more complex variants in subsequent chapters.
