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