Hello,
We have a question about a repeated measures analysis were are currently running.
All participants conducted scans on 3 separate visits each. Thus, there are 3 measurements per subject.
However, the time in between scan visits varied from subject to subject. For example, the time between visit1 and visit2 is 3 days for subject1, the time between visit1 and visit3 for subject8 is 11 days. How can we account for this subject specific variability for time? A traditional 3dANOVA would not account for this variability, correct? Which analysis tool should we use? 3dLME? If it is 3dLME, what are the options for -corStr besides AR or ARMA. Is there a choice for Unstructured?
Any input or suggestions is appreciated.
Michael