Thanks Steve,
I think I'm even more confused. I got the impression if you were
interested the correlation of a behavioural score (eg. reaction time)
with FA between groups, that you demeaned the data and used the -D
flag. Is this still the case?
Specifically for my case, I have about 10 behavioural tests to
investigate for two groups, so I planned to look individually.
Thanks for clarifying this
Suzanna
On 4 Mar 2008, at 18:01, Steve Smith wrote:
> Hi,
>
> This depends on what's in your model. If you have a simple unpaired
> t-test with one EV for each group then definitely do not demean the
> model or the data....does that cover your scenario?
>
> Cheers.
>
>
> On 3 Mar 2008, at 15:05, Suzanna Laycock wrote:
>
>> HI,
>>
>> Sorry for this simple question. I've been reading today's threads
>> about randomise and I was wondering if you have two or more
>> groups, do you demean each group separately or calculate the
>> average for all the groups?
>>
>> Thanks
>> Suzanna
>>
>
>
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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
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