Hi Doug,
a related question, why do the h volumes show differing values for voxels at the odd "time points", supposedly the residual variance per condition, while fast_ldsxabfile only returns one value per voxel for the residual error variance? My expectation is to just have a single eresvar per whole model (or for each real timepoint of the model, but I digress), but what is really inside of the odd timepoints of the h-volumes then?
ahoi Sebastian
On 11. Jul 2006, at 12:07 Uhr, Sebastian Moeller wrote:
Hi Doug, hi List,
I got a question regarding the h volumes inside the analysis sub directories. The content of those file are the regression coefficients for each voxel (XY planes) for each condition (Z stack). Supposedly those estimates are corrected for the noise and would make really nice descriptors of the overall activation of voxels/rois for the given conditions. Now, here is my question, what is the unit of the values in the maps? And is there a way to transform those values into something ala percent change? Would dividing a XY voxel of a slice though the matching voxel value from the h-offset volume result in percent of total?
ahoi Sebastian -- Sebastian Moeller
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