Dear MarsBaR members,
I have a question on the MarsBaR analysis. I got the barch script from the MarsBaR FAQ under 'How do I run a MarsBaR analysis in batch mode?'. The structure marsS from 'compute_contrasts' stores many things including con, stat, and p, and etc. If I want to use a value to represent subject's performance on a specific ROI, should I use the 'con' value or the 'stat' value?
Another related question is that, when I use the function 'getdata' on a contrast image of interest, the mean of Y is very similar to what is returned by marsS.con(contrast_number), but not completely identical. I thought that the rationale is the same for the way to get marsS from 'compute_contrasts' and the Y from 'getdata' so ideally marsS.con(contrast_number) should be identical to Y. Is this correct? Or I'm understanding it in a wrong way?
Thank you so much for your help.
Sien
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