¥ -glt 1
contrasts/contr_AvsT.txt
-glt_label 1 AvsT
¥ -glt 1
contrasts/contr_HvsL.txt
-glt_label 2 HvsL
¥ -glt 1
contrasts/contr_ATvsHL.txt -glt_label 3 ATvsHL
¥ GLTs are General Linear Tests
¥ 3dDeconvolve provides tests for each regressor separately, but if you want to test
combinations or contrasts of the b weights in each voxel, you
need the -glt option
¥ File contrasts/contr_AvsT.txt = 0 0 0 0
0 0 0 0 1 -1 0 0 (one line with 12
numbers)
¥ Goal is to test a linear combination of the b weights
H In
this data, we have 12 b weights: 8
baseline parameters (2 per imaging run), which
are first in the b
vector, and 4 regressor magnitudes,
which are from -stim_file
options
H This particular test contrasts the
Actions and Tool bs
¥tests if bActionsÐ bTool ¹ 0