Hi,

I will be analyzing an event-related design where each trial is 10.5 seconds long and is split into three phases: (3 sec, 3.5 sec, 4 sec) and there are two runs of the task that I will concatenate.
I am interested in modeling different events in each phase based on responses during that phase. I will be using the stim_times option with 1D files that have rows of stimulus onset times for the particular events. I am not sure about whether or not I should be modeling the event with for example BLOCK (3, 1) or GAM. This is how I have set up 3dDeconvolve with the BLOCK function. I was wondering if my set-up looks OK and what the difference is between using BLOCK or GAM and the advantage of each?

Thanks!

3dDeconvolve \
-input ${subj}-WOF_all-reg+orig \
-mask ${subj}-anat-mask3x3-allone+orig \
-censor ${subj}-WOF_all-censor.1D \
-x1D ${subj}-WOF_all-decon \
-x1D_stop \
-polort 'A' \
-num_stimts 26 \
-stim_times 1 ${subj}-WOF-10s.1D 'BLOCK(3,1)' -stim_label 1 10s \
-stim_times 2 ${subj}-WOF-30s.1D 'BLOCK(3,1)' -stim_label 2 30s \
-stim_times 3 ${subj}-WOF-50s.1D 'BLOCK(3,1)' -stim_label 3 50s \
-stim_times 4 ${subj}-WOF-70s.1D 'BLOCK(3,1)' -stim_label 4 70s \
-stim_times 5 ${subj}-WOF-90s.1D 'BLOCK(3,1)' -stim_label 5 90s \
-stim_times 6 ${subj}-WOF-10a.1D 'BLOCK(3.5,1)' -stim_label 6 10a \
-stim_times 7 ${subj}-WOF-30a.1D 'BLOCK(3.5,1)' -stim_label 7 30a \
-stim_times 8 ${subj}-WOF-50a.1D 'BLOCK(3.5,1)' -stim_label 8 50a \
-stim_times 9 ${subj}-WOF-70a.1D 'BLOCK(3.5,1)' -stim_label 9 70a \
-stim_times 10 ${subj}-WOF-90a.1D 'BLOCK(3.5,1)' -stim_label 10 90a \
-stim_times 11 ${subj}-WOF-10w.1D 'BLOCK(4,1)' -stim_label 11 10w \
-stim_times 12 ${subj}-WOF-30w.1D 'BLOCK(4,1)' -stim_label 12 30w \
-stim_times 13 ${subj}-WOF-50w.1D 'BLOCK(4,1)' -stim_label 13 50w \
-stim_times 14 ${subj}-WOF-70w.1D 'BLOCK(4,1)' -stim_label 14 70w \
-stim_times 15 ${subj}-WOF-90w.1D 'BLOCK(4,1)' -stim_label 15 90w \
-stim_times 16 ${subj}-WOF-10nw.1D 'BLOCK(4,1)' -stim_label 16 10nw \
-stim_times 17 ${subj}-WOF-30nw.1D 'BLOCK(4,1)' -stim_label 17 30nw \
-stim_times 18 ${subj}-WOF-50nw.1D 'BLOCK(4,1)' -stim_label 18 50nw \
-stim_times 19 ${subj}-WOF-70nw.1D 'BLOCK(4,1)' -stim_label 19 70nw \
-stim_times 20 ${subj}-WOF-90nw.1D 'BLOCK(4,1)' -stim_label 20 90nw \
-stim_file 21 ${subj}-WOF_all-reg.1D'[0]' -stim_label 21 Roll -stim_base 21 \
-stim_file 22 ${subj}-WOF_all-reg.1D'[1]' -stim_label 22 Pitch -stim_base 22 \
-stim_file 23 ${subj}-WOF_all-reg.1D'[2]' -stim_label 23 Yaw -stim_base 23 \
-stim_file 24 ${subj}-WOF_all-reg.1D'[3]' -stim_label 24 DS -stim_base 24 \
-stim_file 25 ${subj}-WOF_all-reg.1D'[4]' -stim_label 25 DL -stim_base 25 \
-stim_file 26 ${subj}-WOF_all-reg.1D'[5]' -stim_label 26 DP -stim_base 26 \
-concat WOFConcatCuts.1D \
-num_glt 7 \
-gltsym 'SYM: 10s -50s' -glt_label 1 10s -50s \
-gltsym 'SYM: 50w -50nw' -glt_label 2 50w-50nw \
-gltsym 'SYM: 50nw -50w' -glt_label 3 50nw-50w \
-gltsym 'SYM: 30w -70w' -glt_label 4 30w-70w \
-gltsym 'SYM: 30w -30nw' -glt_label 5 30w-30nw \
-gltsym 'SYM: +0.5*10s +0.5*30s -0.5*70s -0.5*90s' -glt_label 6 Rs-Ss \
-gltsym 'SYM: +0.5*10a +0.5*30a -0.5*70a -0.5*90a' -glt_label 7 Ra-Sa \
-bucket ${subj}-WOF_all-decon