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Re: Estimating IRF duration

Author: Paul Hamilton (---.Stanford.EDU)
Date: 01-28-09 21:26

Hi Bob,

> Do you want to estimate average duration for each stimulus class, or individual duration for each stimulus separately (and then average)? These are two somewhat different approaches, and which is better isn't obvious, considering the general crappiness of FMRI data time series.

If FMRI data crappiness plays a significant role (funny: Gary Glover has popularized the term "poopiness" out here), then it would seem best to run 3dNLfim on trial averages of each stimulus class as opposed to on each trial of a given class. Either approach is fine with me, actually. Perhaps whichever folds most seamlessly into the current incarnation of 3dNLfim? Please let me know if you require a more firm decision or additional information.

Much obliged for the help!

Paul

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