[Rasch] Estimating Rasch Measures for Extreme Scores

Michael Lamport Commons commons at tiac.net
Sat Apr 30 05:13:01 EST 2011

In studying stages of development, the very highest stage we measure 
(about 1.5% of the educated population) always have items that have 
larger than 2.0 infit errors.  We do not think they are on a different 
scale.  We have found this in about 20 studies.  Once in a while the 
lowest group of items with the lowest order of hierarchical complexity 
also have larger than 2.0 infit errors

My Best,

Michael Lamport Commons, Ph.D.
Assistant Clinical Professor

Department of Psychiatry
Beth Israel Deaconess Medical Center
Harvard Medical School
234 Huron Avenue
Cambridge, MA 02138-1328

Telephone   (617) 497-5270
Facsimile   (617) 491-5270
Cellular    (617) 320–0896
Commons at tiac.net

On 4/29/2011 1:49 PM, liasonas at cytanet.com.cy wrote:
> Hmmm, I have been working intensely in the rasch world for years, and these are questions I never had to answer. I think that there are not many people around with an answer from the top of their head. Problems like the ones I face today are very common. We may need a dedicated publication that will provide answers to people facing problems when dealing with people who are sceptical about rasch models...
> Sent from my BlackBerry® smartphone
> -----Original Message-----
> From: "Steven L.  Kramer"<skramer1958 at verizon.net>
> Sender: rasch-bounces at acer.edu.au
> Date: Fri, 29 Apr 2011 12:13:12
> To: rasch list<rasch at acer.edu.au>
> Subject: Re: [Rasch] Estimating Rasch Measures for Extreme Scores
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