[Rasch] Negative pt-bis and fit of 1.0? How can this be?

Agustin Tristan ici_kalt at yahoo.com
Wed Mar 7 15:03:57 EST 2012


It is a fit test  yes. It can be used for the Rasch model too.
regards
Agustin
 

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________________________________
 From: Mike Linacre <rmt at rasch.org>
To: rasch at acer.edu.au 
Sent: Tuesday, March 6, 2012 6:28 PM
Subject: Re: [Rasch] Negative pt-bis and fit of 1.0? How can this be?
  

Agustin:

The Hosmer–Lemeshow test -
http://en.wikipedia.org/wiki/Hosmer%E2%80%93Lemeshow_test
- looks like a fit test for a non-uniform ICC. Is this what you mean or something else?

Mike L.


At 3/6/2012, you wrote:

Another option we use in our software Kalt is a model similar to the one proposed by Hosmer and Lemeshow for ligistic regression. It works fine and do not fall in the contradictory situation mentioned by Mark.
>Regards
>Agustin 
Mike Linacre
Editor, Rasch Measurement Transactions
rmt at rasch.org www.rasch.org/rmt/ Latest RMT: 25:3 Winter 2011 
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