GLT in 3dMVM

AFNI Message Board
1

Hi,

I’m using 3dmvm for a within-subjects design with 3 factors (2 levels each). In addition to the main effects and interactions, I’m interested in some specific GLTs. My question is: If I only specify one level of one factor, what does it compare to? For example, does it compare to everything else in the model or to what’s not in the model (“baseline”)? E.g., the following:

-gltCode 7 ‘Stim1: 1*Pain’

where Stim1 is one of the factors and it can take the level Pain or Nonpain.

Hope my question is clear. Thanks!

2

If I only specify one level of one factor, what does it compare to? For example, does it compare to everything
else in the model or to what’s not in the model (“baseline”)?

It compares to 0, which is likely your baseline condition.