Hi - it won't make any difference, you can leave EV2 as it is.
Cheers.
On 11 Apr 2007, at 15:16, Anna Engels wrote:
> Hi,
> Sorry if you get this twice, but it looked like my reply didn't go
> through. Would this method require altering the other EVs in any
> way? As
> an example (see below) if I added a nuisance regressor to cut out 1
> volume
> during the second set of stimuli, (coded 1 for that volume and 0
> everywhere else) should I also alter EV2 (the EV that codes for that
> stimuli) by inserting a 0 instead of a 1 for that volume? If EV2
> and the
> nuisance EV both code that volume as 1, will the data for that
> volume go
> into computing the PE for EV2 and the PE for the nuisance EV, or
> will the
> data from that volume go into neither since it is shared by both EVs?
>
> EV1 EV2 nuisance EV
> 0 0 0
> 0 0 0
> 0 0 0
> 0 0 0
> 1 0 0
> 1 0 0
> 1 0 0
> 1 0 0
> 0 1 0
> 0 1 1
> 0 1 0
> 0 1 0
> 0 0 0
> 0 0 0
> 0 0 0
> 0 0 0
>
> Thanks!
> ~Anna
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
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