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No common coords, empty st_datamat and st_coords
jeusebio
Posted on 09/04/16 17:58:56
Number of posts: 1
jeusebio posts:

I'm running a Behavioural PLS (E.R. fMRI) analysis with two groups. Each participant completed a GO/NOGO task (75 Go trials, 25 NOGO), done in two runs. One subject only finished a single run, though. I'm running the PLS using only the GO condition, with a temporal size window of 8TR (1 TR = 2 seconds). I decide to average the data across runs.

The behavioural measure of interest is their commission error rate.

I try running this with two groups (young and old adults) and I get the following error:

Error in fmri_pls_analysis>concat_st_datamat (line 1018)
   has_ssb = 0;
 
Output argument "num_behav_subj" (and maybe others) not assigned during call to
"/3volatile/strother_lab/jeusebio/MATLAB_pkgs/Pls/plsgui/fmri_pls_analysis.m>concat_st_datamat".
 
Error in fmri_pls_analysis (line 152)
   [st_datamat, st_coords, st_dims, num_conditions, ...
 
Error in fmri_analysis_ui>ExecutePLS (line 2322)
        fmri_pls_analysis(PLSoptions.profiles, 'BEHAV', ...
 
Error in fmri_analysis_ui (line 124)
           ExecutePLS;
 
Error while evaluating uicontrol Callback
 
When I take a look at the session data files, I see that every subject has blank behavdata, st_datamat, and st_coords fields. Here's a picture of one subject. They all seem to have the same pattern.
 
fMRI session data for an Older participant
 
Does anyone have any idea what could be causing this?

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