Thank you for responding. It took 18 minutes from slice 1 to 256 (which is a little faster than its finished in the past). I will try those variables. I am running 3dMVM with these options:
#!/bin/tcsh
3dMVM -mask clippedfullmask3.nii -prefix Accuracy_30 -jobs 1 \
-model 1 \
-resid /Users/jessicadefenderfer/Desktop/CV15_WAV72/ACC_30_RESID.nii \
-wsVars "oxy*acc*noiseType" \
-num_glt 3 \
-gltLabel 1 OxyEff -gltCode 1 'oxy : 1*HbO -1*HbR' \
-gltLabel 2 AccEff -gltCode 2 'acc : 1*right -1*wrong' \
-gltLabel 3 NoiseTypeEff -gltCode 3 'noiseType : 1*vocod -1*noise' \
-dataTable \
Subj oxy acc noiseType InputFile \