FW: [Rasch] Threshol Disordering
Stephanou at acer.edu.au
Tue Dec 19 12:50:04 EST 2006
From: lang at stpt.usf.edu [mailto:lang at stpt.usf.edu]
Sent: Tuesday, 19 December 2006 12:36 AM
To: Anthony James
Subject: Re: [Rasch] Threshol Disordering
I suspect you would be better off with 1.) deciding on a "correct
and scoring dichotomously or 2.) chosing a partial credit model.
There are good discussions and examples in "Introduction to Rasch
Measurement" of different models, and other papers and aricles are
My use of Close tests usually has a list of words to chose from making
the test dichotomous scoring, but even if it were open-ended, I doubt I
would use the rating scale model.
I wonder if Jack Stenner (Lexiles) has any experience with Close Tests;
he may have some other insights.
University of South Florida
> Dear List members,
> I'd be thankful for your expert comments on this.
> I have Rasch analysed a language test which is called the "cloze
> test". It has the following form:
> "The English language today _____ many distinct centres,
> self-governing ____ with their own standards. The two ____ important
> are, of ____, the United Kingdom in terms of ____, and the United
> States in ____ of population. ......."
> The students are to supply the missing words in the text. There are
> 4 texts and each have 25 gaps.
> I have used rating scale model. Each text is a polytomous item with
> 25 categories.
> There is disordering in the thresholds of the test (but not in the
> average measures).
> How can this be interpreted in the context of a cloze test?
> Thanks in adavnce
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