Dear Ian,
Apologies: Rik Henson has pointed out an error in what I wrote yesterday.
>Dear Ian...
>...It's not so much that you are assuming that the observations from
>all subjects are equally reliable (this is clearly not the case!)...
Apparently you DO in fact assume equal 'efficiency' of estimates of
the betas in each individual in a RFX analysis. I'm not quite clear
why (and it worries me a bit, because I know that the variance often
varies considerably from one individual to another!). I thought I
should at least warn you of this immediately; perhaps someone will be
able to write an e mail explaining why this is so later!
Best wishes,
Richard.
--
from: Dr Richard Perry,
Clinical Lecturer, Wellcome Department of Cognitive Neurology,
Institute of Neurology, Darwin Building, University College London,
Gower Street, London WC1E 6BT.
Tel: 0207 679 2187; e mail: [log in to unmask]
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