A two-factor study compares the effectiveness of two different treatments (factor 1) by measuring performance before treatment, immediately after treatment, and three months after treatment (factor 2) for each participant. There are 100 participants, 50 are randomly assigned to treatment A and 50 to treatment B. The results from this study should be evaluated with mixed-design two-factor analysis of variance.

Question

Quizplus · Accepted Answer

The study has two factors - treatment (factor 1) and time (factor 2), which are measured repeatedly for each participant. This is a mixed-design two-factor study and should be evaluated with mixed-design two-factor analysis of variance.

A Two-Factor Study Compares the Effectiveness of Two Different Treatments