[Rasch] Fit & Dimensionality

Anthony James luckyantonio2003 at yahoo.com
Wed Jul 9 17:03:55 EST 2008


Hi all,
I have found something interesting:
"...a Rasch model fit impressively supports unidimensionality of a
test,2 but in reverse, a Rasch model misfit does not necessarily contradict
unidimensionality. The appropriateness of the scoring rule has merely been invalidated
in the latter case" (p.381).
 
This is very different to what I have learned.
Any ideas?
 
It is here:
http://www.informaworld.com/smpp/content~content=a785034366~db=all
 
Cheers
Anthony


      
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