The p-values automatically take into account the nature of the test.
It is not necessary to change the p-values at all - the false positive rates
are fine without any corrections.
All the best,
On 3 May 2012, at 19:14, sere f wrote:
> Dear FSL user,
> i have a question about setting of F test in FEAT.
> I know that it performs a 2-tailed test but t test of contrasts is a 1-tailed test.
> So it is necessary to double the pvalue of Ftest to confront with the t test of contrasts.
> Where can I set the appropriate pvalue for F test in FEAT-gui?
> Thanks in advance.