> Oddly enough, the mainF, interaction, and intercept results without treating ratings as a random effect in
> the lme command match my results from 3dLME while treating ratings as a random effect.
>
> Why is this?

Michael, it looks like you could read the mind of 3dLME. You've done exactly what 3dLME does: whenever a model with a complicated random-effects structure fails, 3dLME switches to a model with just a random intercept.

> How does 3dLME handle missing voxels?

How do you code a missing value in brain imaging data? I thought that NA would not be an option?

If you run lme in R, use option na.action="na.omit", which basically removes that data point from the analysis.

Gang



Edited 1 time(s). Last edit at 03/09/2015 10:41AM by Gang.