> > Julien, when you say the method still has predictive value in the large > sample 'without confounds', do you mean without removing confounds or after > deconfounding? It's also not clear to me whether the scores the Ma study > reported are deconfounded or not, but I guess they are not. If one is > interested in the added value of fMRI predicting cognition (my case), it > makes sense to be conservative, so I would be interested in knowing whether > there's something left in the deconfounded space. >
Sorry, my phrasing wasn't clear. I mean that I obtain similar results to the Megatrawl and to the Ma poster, WITHOUT deconfounding as performed in the Megatrawl. I will let you know how it looks once I use the same deconfounding as in the Megatrawl, i.e.: "Prediction takes place after removing sex, age, age^2 , sex*age, sex*age^2 , brain & head size (as estimated by FreeSurfer), overall head motion (a summation over all timepoints of timepoint-to-timepoint relative head motion) and acquisition date as confounds (the last of these is actually the “acquisition quarter”, which is useful to include because there was a slight change in rfMRI reconstruction code during the third acquisition year-quarter; in future we will instead use the actual reconstruction code version as the confound)." - Julien _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
