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help > RE: conditions: matrix exceeds dimensions-problem
Jul 28, 2012 09:07 AM | Niels Foit
RE: conditions: matrix exceeds dimensions-problem
Hi Alfonso
It is indeed the case that not all conditions are present in all subjects. my experiment consisted of three session, but unfortunaltey some patients were scanned only twice (event-related paradigm, slow, big interstimulus-intervals). My intention was to model a) task-related conn. and b) try to remove the task-effect as described in the neuroimage paper. to do so, i have to import all subjects, despite slight differences in the paradigm. if this doesn't work, i will exclude two or three pats.Originally posted by Alfonso Nieto-Castanon:
It is indeed the case that not all conditions are present in all subjects. my experiment consisted of three session, but unfortunaltey some patients were scanned only twice (event-related paradigm, slow, big interstimulus-intervals). My intention was to model a) task-related conn. and b) try to remove the task-effect as described in the neuroimage paper. to do so, i have to import all subjects, despite slight differences in the paradigm. if this doesn't work, i will exclude two or three pats.Originally posted by Alfonso Nieto-Castanon:
Hi
Niels,
Re-reading your previous post it seems that perhaps not all of the conditions are present in all of the subjects? If this is the case, could you please tell me a bit more about your design? (what your conditions and subject sample are) I am thinking that perhaps you are attempting to model as within-subject effects (e.g. conditions) something that might be better modeled as between-subject effects (e.g. second-level regressors)...
Best
Alfonso
Originally posted by Niels Foit:
Re-reading your previous post it seems that perhaps not all of the conditions are present in all of the subjects? If this is the case, could you please tell me a bit more about your design? (what your conditions and subject sample are) I am thinking that perhaps you are attempting to model as within-subject effects (e.g. conditions) something that might be better modeled as between-subject effects (e.g. second-level regressors)...
Best
Alfonso
Originally posted by Niels Foit:
Hi Alphonso
thank you for the patch, unfortunately it did not solve the problem! any other suggestions?
cheers
niels
thank you for the patch, unfortunately it did not solve the problem! any other suggestions?
cheers
niels
Threaded View
| Title | Author | Date |
|---|---|---|
| Niels Foit | Jul 24, 2012 | |
| Alfonso Nieto-Castanon | Jul 25, 2012 | |
| Niels Foit | Jul 25, 2012 | |
| Alfonso Nieto-Castanon | Jul 25, 2012 | |
| Niels Foit | Jul 26, 2012 | |
| Alfonso Nieto-Castanon | Jul 27, 2012 | |
| Niels Foit | Jul 28, 2012 | |
| Alfonso Nieto-Castanon | Jul 30, 2012 | |