For the first two years of the study, researchers will follow the subjects with scans and memory tests. What type of analysis would be done for each type of design and how would the choice of designs ...For the first two years of the study, researchers will follow the subjects with scans and memory tests. What type of analysis would be done for each type of design and how would the choice of designs affect power? For a between-subjects design, the subjects in the different conditions would be compared after two years. For a within-subjects design, the change in subjects' scores in the different conditions would be compared.
