The most appropriate hypothesis test for a within-subjects design that compares three treatment conditions is a(n) ____.
A) an independent-measures t -test
B) a repeated-measures t -test
C) a repeated-measures analysis of variance
D) a chi-square test for independence

Question

Quizplus · Accepted Answer

A repeated-measures analysis of variance (ANOVA) is the most appropriate hypothesis test for a within-subjects design that compares three treatment conditions. A repeated-measures ANOVA compares the means of three or more groups that are measured by the same participants under different conditions. It is used when the same participants are tested multiple times under different conditions, which is the case with a within-subjects design. The ANOVA allows us to test the main effects of each treatment condition as well as interactions between the conditions. It is more powerful than a repeated-measures t-test because it can account for individual differences in baseline scores and can handle missing data.

The Most Appropriate Hypothesis Test for a Within-Subjects Design That