Dear SPMers!
I got very confused reading the adds of the list about the
non-sphericity correction in SPM2. I have the following problem:
I want to do a one-way ANOVA in SPM2 with 20 subjects which each
completed 2 runs meaning I have 2 conditions (1 condition per run). For
each condition I have 1 contrast per subject (meaning 2x20 contrasts).
If I want to do a non-sphericity correction, I would choose
"replications are over: group(2)" because the conditions are measured in
one session one after the other. Is that correct or do I have to choose
"repl(20)"?
I am looking forward to your advice and thank you in advance!
Greets, Sina Trautmann
--
Dipl.-Psych. Sina Alexa Trautmann
Department of Neuropsychology
and Behavioral Neurobiology
Institute for Cognitive Neuroscience (ICN)
University of Bremen
Grazer Strasse 6
D-28359 Bremen
Email: [log in to unmask]
Phone: ++49 (0)421 218-8273
Fax: ++49 (0)421 218-4408
http: www.neuropsychologie.uni-bremen.de
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