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I would use the full-factorial with 5 groups. Enter the contrast emotional>neutral for each subject.


Best Regards, Donald McLaren
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D.G. McLaren, Ph.D.
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Postdoctoral Research Fellow, GRECC, Bedford VA
Website: http://www.martinos.org/~mclaren
Office: (773) 406-2464
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On Wed, Apr 8, 2015 at 4:38 AM, David Hofmann <[log in to unmask]> wrote:
Hi @all,

I have 4 patient groups and 1 control group in a paradigm where pictures with emotional and neutral content were shown. I computed a GLM with the contrast emotional > neutral at the 1st level and now want to compare the different groups with each other. For example I want to compare all the patient groups together vs the control group or only two patient groups with the control group and so on.

I was wondering if I should use an ANOVA design and which one I should use?

greetings

David