Dear Zita,
It is perfectly OK to use condition averages.
Vladimir
On Wed, Nov 23, 2011 at 7:36 PM, Zita Patai <[log in to unmask]> wrote:
> Dear SPM (Vladimir)
>
> I have a very basic question: if i already have condition averages at the single subject level, is it ok to convert these to images, smooth and then enter then straight into a 2nd level analysis (for which i will have defined the design/estimated the model/ defined the contrasts)?
>
> or do i need to :
> - use trial-level data
> - do first-level analysis as well
> ?
>
> Thank you!
> z
>
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