One reads lots of things in many places, some of which conflict!
Probably best if a proper statistician answer (I am not!)
Rik
Stephen J. Fromm wrote:
> On Wed, 4 Nov 2009 09:35:55 +0000, Rik Henson <rik.henson@MRC-
> CBU.CAM.AC.UK> wrote:
>
> <snip>
>
>
>> The question is not
>> whether the df's are "correct", but how (and whether) you want to
>> partition that error into different components for each ANOVA effect
>> (with each component having different df's).
>>
>
>
> Rik,
>
> Is this really valid, though? The texts I have on ANOVA state that using
> pooled errors in such designs is invalid unless one can show the relevant
> interactions are not significant (at some rather high p-level, like 0.2).
>
> Best,
>
> S
>
>
>> Best wishes
>> Rik
>>
>> --
>>
>> -------------------------------------------------------
>> Dr Richard Henson
>> MRC Cognition & Brain Sciences Unit
>> 15 Chaucer Road
>> Cambridge
>> CB2 7EF, UK
>>
>> Office: +44 (0)1223 355 294 x522
>> Mob: +44 (0)794 1377 345
>> Fax: +44 (0)1223 359 062
>>
>> http://www.mrc-cbu.cam.ac.uk/people/rik.henson/personal
>> -------------------------------------------------------
>>
>
>
>
--
-------------------------------------------------------
Dr Richard Henson
MRC Cognition & Brain Sciences Unit
15 Chaucer Road
Cambridge
CB2 7EF, UK
Office: +44 (0)1223 355 294 x522
Mob: +44 (0)794 1377 345
Fax: +44 (0)1223 359 062
http://www.mrc-cbu.cam.ac.uk/people/rik.henson/personal
-------------------------------------------------------
