The variance normalization is per timeseries. We prefer to use the _vn files provided by the RestingStateStats pipeline so that this is equalizing the unstructured noise.
Peace, Matt. From: HERACLES PANAGIOTIDES <he...@uw.edu<mailto:he...@uw.edu>> Date: Saturday, December 30, 2017 at 2:05 PM To: Matt Glasser <glass...@wustl.edu<mailto:glass...@wustl.edu>> Subject: Re: [HCP-Users] (no subject) Hello Matt, I am getting ready to launch a group analysis of rfMRI files using Matlab. I want to make sure that I am not making any fundamental errors in preprocessing. I would be deeply appreciative, if I could (phone?) consult with you or anyone else, to make sure that I am not making any gross mistakes. At this point, I am following your instructions about mean and and variance normalization before ROI extraction. For example, is this equivalent to a z-score transformation? If so, is this done to the entire 4D volume or to the individual voxel time series? At any rate, these are some of my questions. Thank you for being so kind. Heracles _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
