[Rasch] Not a Fan of Lexiles?
trevor.bond at jcu.edu.au
Fri Nov 2 10:13:24 EST 2007
Dear Paul et al,
But I wonder whether my more "examine those expectations & predictive
accuracy maximization approach" would have achieved even greater
utility without so many assumptions being made about the structure of
Well that is an empirical issue. Chan and Bode produced the goods
when the field has failed...and you have produced no attempt.
Once you treat data models as "optional", and focus on the problem to
be solved rather than forcing a single data model to be applied to
it, all kinds of analysis and solution options open up.
But, I guess if your primary goal, or your perception of a
problem-solution is to create a quantitatively structured latent
variable, then a data-model approach is mandatory, with
the appropriate indicators of model fit.
The field seems to be pretty well affixed to: creating a
quantitatively structured latent variable. That's what the DEX is. It
is the standard indicator in the field. The Chan and Bode Rasch
analysis reveals some primary evidence about why the dysexecutive
functioning index is dysfunctional.
best wishes, Paul
Trevor G BOND Ph D
Professor and Head of Dept
Educational Psychology, Counselling & Learning Needs
D2-2F-01A EPCL Dept.
Hong Kong Institute of Education
10 Lo Ping Rd, Tai Po
New Territories HONG KONG
Voice: (852) 2948 8473
Fax: (852) 2948 7983
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