cliff macnab wrote:
> Dear All,
>
> I would like to know how the one sample t-test is
> implemented for second level analysis. Suppose the
> "raw" data for a one sample t-test are from 5
> subjects: a1, a2, a3, a4, a5, for the one sample
> t-test, a hypotheses mean has to be given. My question
> is how to set the hypothese mean?
>
Usually a hypothesis mean of zero is used. In fact, in the
classical inference procedures implemented in SPM there is no
other option.
In SPM's Bayesian inference you can produce posterior
probability maps of the population effect being greater
than a user-specified size eg. 1% of the global mean.
Best,
Will.
> Thanks,
>
> Cliff
>
>
>
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--
William D. Penny
Wellcome Department of Imaging Neuroscience
University College London
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