@andrewlynnphd
In addition to the typo, there are issues with the model specification. If both factors, format and quantity, are within-individual, I recommend employing 3dLMEr and following the guidelines outlined in this instruction. Alternatively, you can use 3dMVM if no missing data occur.
Gang Chen
The National Institute of Mental Health (NIMH) is part of the National Institutes of Health (NIH), a component of the U.S. Department of Health and Human Services.
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