Hi Rick,

I think the two images could be interpreted as a video, so I'll have onset times for the first image and then a block function of 1 second. So, I have to generate stimuli files for each condition that I want to compare, correct? Basically, in one file (correct) having onsets of the first image when the subject makes a correct decision, and in another file (incorrect) the onsets of the first image when the subject is incorrect. Then, I can do the same for the other two "irrelevant" stimuli, namely confidence (split into low / high confidence) and trust (split into "subject makes a different decision" vs. "subject makes the same decision" after feedback). Does this make sense? See code below.

-regress_stim_files                                              \
            stim1_correct_stim_file.1D                      \
            stim1_incorrect_stim_file.1D                   \
            stim2_confident_stim_file.1D                  \
            stim2_nonconfident_stim_file.1D            \
            stim3_trust_stim_file.1D                          \
            stim3_distrust_stim_file.1D                     \
-regress_stim_labels                                           \
            correct incorrect                                      \
            confident nonconfident                            \
            trust distrust                                            \
-regress_basis_multi                                           \
            "BLOCK(1,1)"                                          \
            "BLOCK(1,1)"                                          \
            "BLOCK(2,1)"                                          \
            "BLOCK(2,1)"                                          \
            "BLOCK(2,1)"                                          \
            "BLOCK(2,1)"

Otherwise, if I put the onsets of all stimuli in one file, how do I specify the conditions I want to compare?

Thank you!
Davide