GLM repeated multivariate or within subject

[Kornbrot, Diana]

Please can anyone tell me what are criteria for using multivariate F rather than within subject F

I know some experts [now including me] prefer within subject but would like to know detailed rationale

Best

Diana

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[Bruce Weaver]

The most common reason to use MANOVA rather than conventional repeated
measures ANOVA, I think, is that the former does not require sphericity.
But the cost can be lower power in some circumstances.  See the MANOVA
section in Thom Baguley's nice note on sphericity:

  http://homepages.gold.ac.uk/aphome/spheric.html

ultilevel modeling of repeated measures data is another approach that is
arguable preferable to either classical RM ANOVA or MANOVA.  

  http://jakewestfall.org/misc/Quene2004.pdf

HTH.



Kornbrot, Diana wrote

> Please can anyone tell me what are criteria for using multivariate F
> rather than within subject F
>
> I know some experts [now including me] prefer within subject but would
> like to know detailed rationale
>
> Best
> Diana
> ____________
> University of Hertfordshire
> College Lane, Hatfield, Hertfordshire AL10 9AB, UK
> [phone]
> [phone]

> d.e.kornbrot@.ac

> <mailto:

> d.e.kornbrot@.ac

> >
> http://dianakornbrot.wordpress.com/
> skype:  kornbrotme
> Save our in-boxes! http://emailcharter.org
>  __________________
>
>
>
>
>
>
>
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
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Bruce Weaver
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