[Rasch] Fit & Dimensionality

Anthony James luckyantonio2003 at yahoo.com
Wed Jul 9 17:03:54 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:

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