Suppose you were interested in the longer-term effects of the imagery interventions and so you decide to get the experimental group to measure their anxiety scores using the SCAT questionnaire again, but this time 12 weeks later. What type of test might you use if you were interested in examining the variance at 0, 6 and 12 weeks?
A) Kruskal-Wallis test
B) Friedman's test
C) Sign test
D) McNemar's test

Question

Quizplus · Accepted Answer

Friedman's test is appropriate for analyzing the change in a single group over multiple time points. It is a non-parametric test used when the data are not normally distributed or when the assumption of sphericity is violated. Therefore, it is the best choice to examine the variance in anxiety scores at 0, 6, and 12 weeks in the experimental group.

Suppose You Were Interested in the Longer-Term Effects of the Imagery