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Hello all, I am writing this email with regards to event-related (go/no-go task) ASL analysis. During the first level analysis, I created my model and FEAT automatically created the OCs including perfusion activation, BOLD, and control-tag comparisons. I am not sure if I need all of these (particularly BOLD) since I have been working on ASL data. Instead, I was planning to add each comparison of go and no-go interactions with c-t. Therefore, I added 4 more contrasts more: go task greater or lower than c-t (1, -1 and -1, 1) plus no-go task greater or lower than c-t (1, -1 and -1, 1). But this model results in almost no activation in go vs c-t and no-go vs c-t comparisons, which makes me think of what if I am doing something wrong. Before I go for group analysis what would you advise me to do? I would be appreciated for your help. The design is attached below if you would like to take a look. Regards, M Burak Baytunca Clinical Research Fellow, MD Bipolar and Psychotic Disorders Division Mclean Hospital, Harvard Medical School ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1