Gang Chen wrote:

> Hi Adam,
>
> Do you mean that you want to average the percent signal changes
> among those time lags whose values are above a user-specified
> threshold instead of specifying lag intervals (i.e., from lag 4
> to 9)?

Yes, this is exactly what I was thinking.

>
> If this is the case, I can't think of an elegant way to do it
> because the lag (and subbrik) interval could be different for
> each voxel. And I guess this is why they obtained the average
> based on the lag interval in HowTo5.

I'm sure you're correct. I was hoping there was a simpler way since different brain regions often have different time-to-peak bold responses. If there was a way of simply defining a threshold it could save lots of time pouring over each voxel's IRF before running the ANOVA. Has anyone else thought of a way to do this?

Thanks,
Adam