Dear Alexander
If the eye-artefact is only there in some of the con images it will
not make it through the threshold in the final second level analysis.
This could have been the case in a fixed effects analysis but not in a
random effects analysis. If you want to avoid those artefacts you
could include a time-series from an eye-voxel in your design matrix.
This would most likely remove the eye-artefact, but you risk removing
some of the activity as well.
Best
Torben
Den 31/03/2009 kl. 16.56 skrev Alexander Lebedev:
> Dear SPM experts
>
> I decided to check my old results, and found one problem. When I
> have opened con*-files in xjview tbx, strange thing appears... There
> are activations of eye movements (notwithstanding of Normalization)
> in some con*-files. May I include such results in group study? Could
> you advice me any solutions to prevent this trouble?
>
> Thank you beforehand
>
> Best Regards
> --
> Alexander Lebedev.
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