Hi Juergen,

we're trying to minimize technology-induced differences. In the case where tp1 and tp2 are the same scan, you will then have applied a different procedure to tp2 then tp1 (it will have been processes longitudinally twice), so you will find differences where none exist. This is why we avoid it.

cheers,
Bruce
On Wed, 12 Nov 2008, Juergen Haenggi wrote:

Dear FS experts

Is there any difference or problem when running tp2 on the "longitudinally
adjusted" tp1 instead on the recommended cross-sectionaly processed tp1?

Thanks in advance
Regards
Juergen

-----------------------------------------------------------
Juergen Haenggi
Ph.D. (Dr. des.)
Division of Neuropsychology
Institute of Psychology
University of Zurich
Binzmuehlestrasse 14, PO Box 25
8050 Zurich, Switzerland
0041 44 635 73 97 (phone office)
0041 76 445 86 84 (phone mobile)
0041 44 635 74 09 (fax office)
BIN 4.D.04 (office room number)
[EMAIL PROTECTED] (email)
http://www.psychologie.uzh.ch/neuropsy/ (website)
http://www.juergenhaenggi.ch (private website)
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