[pymvpa] classification project

J.A. Etzel jetzel at artsci.wustl.edu
Wed Sep 19 14:56:05 UTC 2012

This is far too general of a question: which steps are necessary depends 
upon the precise hypothesis you're testing with the analysis. I can 
easily think of a half dozen analysis schemes appropriate in various 

You should start by making your hypothesis as concrete as possible. For 
example, are you interested in widespread activity, or activity in 
particular brain areas only? Are you interested in activity during 
particular times during the clips, or some sort of temporally averaged 

There are many useful tutorials; the ones by Pereira, Mur, and (if I say 
so myself) Etzel are good starting points.

good luck,

On 9/19/2012 7:19 AM, Abduljalil Sireis wrote:
> Hi,
> I need help  in classification project of subjects see two types of
> video clips. One kind is dangerous car accidents and the other is normal
> car advertisements. We have number of subjects perform this task with
> one session per subject. Each run consists of 6 clips from each type,the
> two successive spots are separated by black screen and a yellow cross to
> fix the subjects eyes. There was not a specific order of the spots but
> more than two successive ones of the same type were not allowed. All
> videos were accompanied with voice, so we have visual and audio
> stimulation.
> I think that i need to do features selection with respect to the active
> regions corresponding to the stimulations, then a cross-validation leave
> one-run-out can be applied. Could you please guide me through this
> project? Which concrete steps should i need to do?
> Thank you,
> Abdul
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Joset A. Etzel, Ph.D.
Research Analyst
Cognitive Control & Psychopathology Lab
Washington University in St. Louis

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