getting error in 3dMVM run

AFNI Message Board
22

direction of influence: is NIC → BMI

If this is the case, I recommend constructing two separate models: one for the effect of BMI and the interaction between NIC and BMI, and another for NIC only.

Model 1: Effect of BMI and NIC-BMI interaction

...
-bsVars 'BMI+NIC+inter'
-qVars 'BMI,NIC,inter'
-qVarCenters '0,0,0'
-mask BrainMask_MNI_222.nii
-num_glt 2
-gltLabel 1 'BMI_main' -gltCode 1 'BMI :'
-gltLabel 2 'BMI_NIC_interaction' -gltCode 2 'inter :'
...

Model 2: NIC only

...
-bsVars 'NIC'
-qVars 'NIC'
...
-num_glt 1
-gltLabel 1 'NIC_main' -gltCode 1 'NIC :'
...

The rationale for this modeling statregy is detailed further here.

I corrected but no result

When you say "no result," do you mean that 3dMVM 1) failed to execute, 2) produced no output, or 3) yielded unexpected results?

Gang Chen

23

Hi Gang Chen,

I am getting the output file but when I am trying to plot this. It doesn't look like linear regression plot or interaction effect plot. It looks more of correlation both BMI and NIC graphs are in same direction.

24

Also do you think 3Dconvolve can be helpful or not