Dear Milan,
> We're interested in doing a fixed effects analysis of 8 subjects.
> Each subject had 6 runs(sessions). So, would it be fair to catenate
> the data and run the analysis as 1 subject with 8 sessions ( or 48
> sessions)?
>
> I guess the other alternative is to do a random effects analysis and
> specify and estimate a model for each subject individually. Then one
> would go to a one sample t-test and use the con***.img files from
> each subject to do a group analysis.
>
>
> Am I right in all this?
You're right, you could model each run of a subject as one session
giving you 48 sessions. For a 2nd level analysis, you can choose either
way: Take the contrast images from a 48 sessions analysis or analyse
each subject individually.
Stefan
--
Stefan Kiebel
Functional Imaging Laboratory
Wellcome Dept. of Cognitive Neurology
12 Queen Square
WC1N 3BG London, UK
Tel.: +44-(0)20-7833-7478
FAX : -7813-1420
email: [log in to unmask]
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