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Posted on 11/17/13 15:38:23
Number of posts: 229
Posted on 11/17/13 07:23:58
Number of posts: 18
Dear PLS experts,
When using univariate method for connectivity analysis (SPM), white matter and CSF signals are usually regressed out from fMRI data prior analysis. fMRI data also are bandpass filtered to keep only the neuronal component. I am wondering if these preprocessing steps also are needed when using PLS?
Any suggestion/explanation will be very welcome,
Many thanks
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Posted on 11/17/13 15:42:36
Number of posts: 229
Hi Mohamad... I've moved this to a new thread to reflect the new topic
All of the preprocessing steps you have mentioned are "at the user's discretion". This is true for both univariate and multivariate approaches. It is the responsibility of the user to understand how the decisions may (or may not) impact on the results obtained with the chosen analysis method...
So.. there is no easy answer to your question.. Some users of PLS have removed CSF/WM signal, others do not
cheers
Nancy
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