[Rasch] Validity in Rasch

Juanito Talili talilij at yahoo.com
Tue Mar 22 01:57:50 EST 2011

First, I dont know what really are the assumptions of Rasch Model.  I just learned from Mike's posting that the assumptions of RM are as follows:  Unidimensionality, conditional independence, sufficiency and monotonicity.
Perhaps, such assumptions cannot be empirically tested using Winsteps.  As I undertand the words of Mike, Winsteps used parameter-level tests of assumptions. But I dont know what are these tests in the Winsteps outputs.

--- On Mon, 3/21/11, Bond, Trevor <trevor.bond at jcu.edu.au> wrote:

From: Bond, Trevor <trevor.bond at jcu.edu.au>
Subject: Re: [Rasch] Validity in Rasch
To: "Juanito Talili" <talilij at yahoo.com>, "Rasch Forum" <rasch at acer.edu.au>
Date: Monday, 21 March, 2011, 6:28 AM

Dear Juanito,
Which ‘assumptions’ do you mean?
Prof. Trevor G Bond
Adjunct Professor
School of Education
James Cook University Q 4811

Mob: 0416 82 70 83
Fax: (07) 47 251690
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On 21/03/11 3:34 PM, "Juanito Talili" <talilij at yahoo.com> wrote:

Can you suggest a reference that deals with the assumptions of Rasch Model?.  How to test the assumptions using Winsteps?

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