Andrew Holmes wrote:
> The key concepts for successful random effects analyses using the
> random effects kit are:
> (1) For inference to the population, it's the sampling of
> subjects that matters most, not the number of scans/sessions
> per subject.
> (2) For valid population inference using the random effects
> kit, you cannot have more than one scan per subject per
> condition. (Strictly speaking you should only enter two
> conditions too.)
>
could you expand upon this last point about two conditions? Is this related
to sphericity assumptions that are necessary for >2 conditions, or some
altogether different issue?
thanks,
russ
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