[Rasch] Models of unidimensionalconstructshavetheirlimitations:what is a "good thing"?

commons commons at tiac.net
Fri Nov 9 09:47:22 EST 2007

That is also my point.  Scales have to be unpacked even if the combination
one appears to be unidimensional.


My best,

Michael Lamport Commons, Ph.D.
Assistant Clinical Professor
Department of Psychiatry
Harvard Medical School
Beth Israel Deaconess Medical Center

234 Huron Avenue

Cambridge, MA 02138-1328
commons at tiac.net
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From: rasch-bounces at acer.edu.au [mailto:rasch-bounces at acer.edu.au] On Behalf
Of Paul Barrett
Sent: Thursday, November 08, 2007 5:41 PM
To: rasch at acer.edu.au
Subject: RE: [Rasch] Models of
unidimensionalconstructshavetheirlimitations:what is a "good thing"?




From: Stephanou, Andrew [mailto:Stephanou at acer.edu.au] 
Sent: Friday, November 09, 2007 11:32 AM
To: Paul Barrett
Cc: rasch at acer.edu.au
Subject: RE: [Rasch] Models of unidimensional
constructshavetheirlimitations:what is a "good thing"?


For what concerns temperature, the definitions you mention are text book
definitions that refer to simple and specific contexts. I do not know why
you also mention heat. Heat is not temperature. The best I can do for you is
to refer you to a paper about the meaning of temperature and how poorly it
is understood by physics teachers.

e>  Baierlein, The meaning of temperature, Physics Teacher, 28, 94 (1990)



Hello Andrew


I only mentioned Heat to show how the definition of temperature involves two
other constructs, heat and energy - not that they are definitional of it
(being fair to the "complexity" issue)


I do not understand why you wrote that "neuropsychological test results are
affected by multiple factors, but usually age and education are the only
variables by which norms are stratified". 


I didn't. That was the abstract to the paper, I provided it in my message
only to show how these authors used that term "reading ability".


Regards .. Paul




Paul Barrett, Ph.D.

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Chief Research Scientist

Office | 918.749.0632  Fax | 918.749.0635

pbarrett at hoganassessments.com


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