Hi Michael, (or anyone else so-inclined)
I'm also currently finding this issue confusing, and I would be grateful if you could explain (briefly) the rationale for creating a template between groups? I can understand why one would warp all the images to the same template, but why the intermediate step of warping them all to what is essentially a mean template?
This also takes me back to a question I asked a few days ago about what the appropriate DARTEL approach would be for a between-groups longitudinal design. Would you have any suggestions to help me choose between:
1) Make a template per participant, collapsing over time
2) Make a "template" from the first time-point for each participant
3) Make a template from all the data at once.
The approach in the VBM8 toolbox appears to be one of beginning by producing a warp for one image per participant to the standard template.
Thanks in advance for any help,
Alexis
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