AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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November 17, 2009 10:33PM
Hi Everyone,

I realize a lot has been discussed on this issue on the message board but I'm a little unclear on how to create a peri-stimulus time series based on deconvolution analysis. In other words, I want to measure the signal change over the course of say 18 seconds for each event of interest averaged across all trials of that event type. So, if I have happy, fearful, and neutral faces presented in a fast event related design, I want to plot the average waveform over 18s (assuming a TR of 2s). I want to do this initially on a single subject basis. Is the following correct?

3dDeconvolve -input all_Runs+orig \
-polort 3 -num_stimts 9 \
-stim_file 1 fear.txt \
-stim_label 1 fear \
-stim_file 2 happy.txt \
-stim_label 2 happy \
-stim_file 3 neutral.txt \
-stim_label 3 neutral \
-stim_minlag 1 0 -stim_maxlag 1 9 \
-stim_minlag 2 0 -stim_maxlag 2 9 \
-stim_minlag 3 0 -stim_maxlag 3 9 \
-stim_file 4 'moveParam_all.txt[1]' -stim_base 4 -stim_label 4 roll \
-stim_file 5 'moveParam_all.txt[2]' -stim_base 5 -stim_label 5 pitch \
-stim_file 6 'moveParam_all.txt[3]' -stim_base 6 -stim_label 6 yaw \
-stim_file 7 'moveParam_all.txt[4]' -stim_base 7 -stim_label 7 dS \
-stim_file 8 'moveParam_all.txt[5]' -stim_base 8 -stim_label 8 dL \
-stim_file 9 'moveParam_all.txt[6]' -stim_base 9 -stim_label 9 dP \
-iresp 1 fear.irf -iresp 2 happy.irf \
-iresp 3 neutral.irf \
-sresp 1 fear_std -sresp 2 happy_std -sresp 3 neutral_std \
-fitts full_model.fit -errts residual_error.fit \
-fout -tout \
-bucket decon_results

Subject Author Posted

Deconvolution

Jatin November 17, 2009 10:33PM

Re: Deconvolution

rick reynolds November 18, 2009 09:20AM

Re: Deconvolution

Jatin November 18, 2009 09:50AM