Hi - a 2x3 example is given in the FEAT manual, at:
http://fsl.fmrib.ox.ac.uk/fsl/feat5/detail.html#ANOVA3factors2levels
Cheers.
On 9 Dec 2008, at 12:30, Hilary watson wrote:
> Hi
>
> I am attempting to replicate results produced using SPM and need a
> bit of
> help running an ANOVA on my contrasts.
>
> Basically my experiment has been designed so that I can look at
> recogntion
> memory for faces and scenes across three levels of response
> category. I
> have already produced images of parameter estimates for my
> conditions of
> interest, now I need to put these into a ANOVA to identify if there
> are any
> main effects and interactions.
>
> My 6 conditions of interest are as follows
>
> facerec
> facefam
> facecr
> scenerec
> scenefam
> scenecr
>
> .. a 2x3 ANOVA because of 2 factors for stimulus (face, scene) and 3
> levels
> of response category (rec, fam, cr).
>
> How would I model this in a higher level feat analysis in order to
> identify
> whether I get main effects of stimulus and response catgory that I can
> investigate further with subsequent contrasts. e.g a main effect of
> stimulus face>scene (across stimulus type). I have looked on the
> help pages
> but I am still unsure?
>
> In addition to this, if I was to find some kind of signicant
> interaction how
> would I set up a contrast to follow this up..? e.g. scene>face x
> rec>fam or
> scene>face x cr>fam or face>scene x rec>fam or face>scene x cr>fam?
>
> Any help with this would be greatly appreciated
>
> Cheers
>
> Hilary
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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