Hi,
Yes, just multiply the PEs by the peak-peak height (which you can find
from the design.mat file).
On 22 Apr 2009, at 11:56, Aryan Singh wrote:
> Hi FSLers,
> I have two PE values , one from a 4s duration stimulus and another
> from an 8s duration stimulus. Instead of doing a t test to test for
> difference between the intensities i just want to look at the PE
> values for comparison. Should i have to multiply each PE value with
> the respective Peak to peak height of its convolved model in order
> to see if the 8s PE is higher in value to the 4s PE? Is this
> multiplication/rescaling the same as rescaling the 4s and 8s
> regressors to the same peak to peak height after convolution ?
Yes.
Cheers.
> i.e first question is basically rescaling PE after regression and
> the latter question is rescaling before regression. I hope i made
> sense.
> Thank you!
> Aryan
>
>
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