Hi, Stephen
Thanks for your comments. but the design matrix looks different in feat. I guess I didn't make it clear in my last email. I am most concerned that if I need to add convolution if I specify 10 EVs. I did follow through the practical materials but wasn't clear how FIR should be used in feat model. I might have overlooked somewhere though.
Thanks,
Tony
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From: FSL - FMRIB's Software Library [[log in to unmask]] on behalf of Stephen Smith [[log in to unmask]]
Sent: Thursday, August 08, 2013 2:22 AM
To: [log in to unmask]
Subject: Re: [FSL] Time locked averaging
Hi
On 8 Aug 2013, at 05:30, Tony Jiang <[log in to unmask]<mailto:[log in to unmask]>> wrote:
Dear FSL users,
I am trying to do a time locked averaging and not sure if I should use FIR basis in feat. My experiment is a block design (10TRs each block). my plan is to estimate one beta for each TR in the block. for example, B1 for first TR in each block, B2 for second TR in each block. I can do this by using 10 EVs (specifying onsets) with no convolution. this is essentially averagint across blocks.
Or can I just use 1 EV then convolve it with FIR (number of bins=10; window=20s.my TR=2s). which method is better?
Same thing - I would recommend reading through the FEAT manual thoroughly - and also maybe looking at the course lecture/practical material that's online.
Cheers.
Also i would like to know how tsplot creates the peristimulus time plots in feat.
Thanks,
TOny
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