Hello again,
just a few corrections of wrong numbers: ON is 30 s and the shortest
OFF is 15 s (not 18 s). The FIR setting was also wrong. The window
should be 45 s and there are 18 EVs. Sorry for any confusion.
I would still appreciate any comment on the higher-level analysis.
Cheers
Pavel
On 10 April 2017 at 14:10, Pavel Hok <[log in to unmask]> wrote:
> Dear FSL experts,
>
> I could not find an appropriate answer in previous posts. I am trying
> to analyse a block design dataset with long epochs (30 s ON, at least
> 18 s OFF, TR 2.5 s, no jitter with respect to TR). We know already
> that the response does not follow the canonical HRF. I therefore
> created a single subject design with 22 FIR basis functions with
> window 55 s.
>
> Having a single contrast for activation, I ended up with 22 copes per
> subject. Just for the record, each subject had two such runs, so I
> averaged the copes in a middle-level FE analysis. Now, is there any
> other way to perform group analysis other than feeding all the cope
> images to the group analysis, making a contrast for average per bin,
> and F-test across all contrasts?
>
> I wish to know a) where the brain activates at any timepoint (F-test)
> and b) what is the shape of the response (single COPE or PE?).
>
> Thanks for any help!
>
> Cheers
>
> Pavel
>
>
> --
> -------------------------------------------------------------------------------
> -- MUDr. Pavel Hok
> -------------------------------------------------------------------------------
> -- Laboratoř funkční magnetické rezonance
> -- Neurologická klinika
> -- Lékařská fakulta
> -- Univerzita Palackého v Olomouci
> -- Fakultní nemocnice Olomouc
> -------------------------------------------------------------------------------
> -- Laboratory of functional magnetic resonance imaging
> -- Department of Neurology
> -- Faculty of Medicine and Dentistry
> -- Palacky University Olomouc
> -- University Hospital Olomouc
> -- Czech Republic
> -------------------------------------------------------------------------------
> -- I.P. Pavlova 6, 775 20 Olomouc
> -- web: fmri.upol.cz
> -- tel.: +420 588 443 418
> -- e-mail: [log in to unmask]
> -------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
-- MUDr. Pavel Hok
-------------------------------------------------------------------------------
-- Laboratoř funkční magnetické rezonance
-- Neurologická klinika
-- Lékařská fakulta
-- Univerzita Palackého v Olomouci
-- Fakultní nemocnice Olomouc
-------------------------------------------------------------------------------
-- Laboratory of functional magnetic resonance imaging
-- Department of Neurology
-- Faculty of Medicine and Dentistry
-- Palacky University Olomouc
-- University Hospital Olomouc
-- Czech Republic
-------------------------------------------------------------------------------
-- I.P. Pavlova 6, 775 20 Olomouc
-- web: fmri.upol.cz
-- tel.: +420 588 443 418
-- e-mail: [log in to unmask]
-------------------------------------------------------------------------------
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