On Wed, Oct 10, 2012 at 10:45 AM, Rosalia Dacosta <
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> Many thanks Tibor,
>
> So, I am going to sepparate them in two columns (two EV) with 1 for right
> handers and -1 for left handers.
>
> Warm regards,
>
> Rosalia.
>
> 2012/10/10 Auer, Tibor <
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>
>> You have a two-sample unpaired design, thus it must be separable.
>> Therefore, any covariate must be specified separately for the two group.
>>
>>
>>
>> Ave,
>>
>>
>>
>> Auer, Tibor M.D. Ph.D.
>>
>> Biomedizinische NMR Forschungs GmbH
>>
>> am Max-Planck Institut für Biophysikalische Chemie
>>
>> Am Fassberg 11
>>
>> 37077 Göttingen
>>
>> Germany
>>
>> Phone/Work: +49-(0)551-201-1725
>>
>> Phone/Home: +49-(0)551-387-0076
>>
>> Mobile: +49-(0)176-8012-7921
>>
>> Mail:
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>>
>>
>>
>> From: FSL - FMRIB's Software Library [mailto:
[log in to unmask]] On Behalf
>> Of Rosalia Dacosta
>> Sent: Wednesday, October 10, 2012 3:52 PM
>> To:
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>> Subject: Re: [FSL] Handedness
>>
>>
>>
>> Hi Angela,
>>
>>
>>
>> Thank you for your replay. Just one clarification: these are categorical
>> variables....so you say I can put 1 for right handers and -1 for left
>> handers in the same column (EV) although i have two groups: patients and
>> controls or I have to put them in different EV or colummns as regressors.
>>
>>
>>
>> This is a very important issue, because of our previous results.
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Rosalia.
>>
>>
>>
>> 2012/10/10 Angela Favaro <
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>>
>> Hi Rosalia,
>> this would be 0 mean only in the case you have the same number of
>> left-handed and right-handed subjects. I think you simply have to demean
>> these values.
>>
>> best
>> Angela
>>
>>
>> > Dear Fsl experts,
>> >
>> > Sorry, about my last message:
>> >
>> > If I need to make excactly zero mean when substracted a EV regressor
>> > from
>> > all the original values..., the right would be coding:
>> >
>> > Right handedness = 1
>> >
>> > Left handedness = -1
>> >
>> > Is it correct,
>> >
>> > Cheers,
>> >
>> > Rosalia.
>> >
>>
>>
>
>