Hi Rick,

rick reynolds Wrote:
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> Colm, if I were to add such a model function:
> a. Would this satisfy your needs?
> b. Would you want to fit all 7 parameters, or is
> there a reasonable subset that would work?

I'd definitely try to use it.

My previous attempts at fitting the gamma model using R worked but the range of values of produced for the parameters and the peak of the gamma function varied by orders of magnitude among my subjects because the re was such variability in the per subject IRFs. When I tried to do stats on the parameters and peak amplitude nothing showed as significantly different between the two groups. However, the problem I face with the task I'm using is that the stimuli are always presented for 2sec and in a pseudo randomized order but with no jitter making it hard to disentangle the end of the response to one stimulus to the beginning of the next.