Dear Glen,
For a single subject, the SPM t or F is simply based on the rank of the first level design matrix and the within-subject variance
Martin
Martin Dietz
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On Jan 25, 2012, at 2:30 PM, Glen Lee wrote:
> Dear SPMers,
>
> Can anybody explain based on what the SPM t-map was generated for a particular contrast (e.g., condition vs. rest) at a single subject (first) level?
> t-values at the second level RFX seems straight forward to me as we could calculate the variance and df from many subjects, but I'm still not sure how
> t-value was calculated from an individual contrast image.
>
> Thanks in advance,
> Glen
>
>
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