Hi Doug, thanks for your reply. I would like to feed the differences into a FFX group analysis, so I think I will need to resort to your workaround. It would be great if you could provide that. Thanks! Caspar
2014-11-10 13:45 GMT-05:00 Douglas N Greve greve@nmr.mgh.harvard.edu:
To get sig maps for an individual, this is problematic but I could probably come up with a work-around. For a group analysis, you can simply compute each taskreg separately, then subtract the two prior to running mri_glmfit. doug
On 11/10/2014 01:36 PM, Caspar M. Schwiedrzik wrote:
Hi! A quick follow-up: I have a taskreg file with 6 continuous predictors. I would like to run specific contrasts, e.g., predictor 1 vs. mean(predictor 2:6). From what I gather, selxavg3-sess will run automatic contrasts on taskregs, but the automatic contrasts are against baseline. This is not what I need at this point. mk-contrast-sess does not like what I am putting in because I do not have a paradigm file in which condition numbers are specified. Is there a way to compute specific contrasts between multiple taskregs, and if not, is there a workaround? Thank you very much, Caspar
2014-11-06 15:23 GMT-05:00 Caspar M. Schwiedrzik <cschwiedrz@rockefeller.edu mailto:cschwiedrz@rockefeller.edu>:
Hi! I have several external regressors in my analysis that I configure with -taskreg in mkanalysis-sess (something like -notask -taskreg nameoffile 6). I was wondering how to set up mkcontrast-sess to contrast these regerssors given that I do not have a paradigm file for them. Can I just do something like -a 1 -c 2 -c 3 -c 4 -c 5? Thanks, Caspar
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