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History of AFNI updates  

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January 31, 2017 12:07PM
James,

> I'm still confused about whether it is justified to ignore any pre-stimulus anticipatory effects, which
> is what TENTzero seems to do. And yet, at least in my case the stats come out the same, it's really
> just a question of how the plotted responses look.

If you believe that anticipation effect may exist, go with TENT. If TENT(0, ...) is not good enough to catch longer anticipation, use a negative number such for the first parameter in TENT.

> Could you explain to me, more generally, why TENTzero exists? That is, what was the motivation for
> adding it to AFNI in the first place? If I understood that, perhaps I could answer my own questions.

If you don't expect any anticipation (nor stimulus timing errors) for your trials, use TENTzero. In other words, TENTzero is basically like the shape-fixed approach with GAM or BLOCK in terms of stimulus onset times with the assumption that BOLD response starts at the moment when each stimulus begins.

Gang
Subject Author Posted

TENT and TENTzero

jkeidel January 25, 2017 10:43AM

Re: TENT and TENTzero

Gang January 25, 2017 02:36PM

Re: TENT and TENTzero

jkeidel January 26, 2017 06:03AM

Re: TENT and TENTzero

Gang January 26, 2017 10:53AM

Re: TENT and TENTzero

jkeidel January 30, 2017 12:20PM

Re: TENT and TENTzero

Gang January 31, 2017 12:07PM

Re: TENT and TENTzero

jkeidel February 01, 2017 07:33AM

Re: TENT and TENTzero

Bob Cox January 25, 2017 06:49PM

Re: TENT and TENTzero

Gang January 26, 2017 10:41AM



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