[Rasch] Fw: Disordered thresholds and collapsing

Thomas Salzberger thomas.salzberger at gmail.com
Mon Nov 5 19:49:54 EST 2012

Dear all,

Anthony asked me whether I could forward the message to the acer list,
which I do hereby,


> ----- Forwarded Message -----
> From: Anthony James <luckyantonio2003 at yahoo.com>
> To: "rasch at acer.edu.au" <rasch at acer.edu.au>
> Sent: Sunday, November 4, 2012 3:45 PM
> Subject: Disordered thresholds and collapsing
> Dear all,
> I heard from some colleagues that collapsing categories in the case of
> disordered thresholds is problematic and is not recommended. Apparently this
> is a very recent development in rating scale analysis. Can you please
> comments on this or refer me to some sources?
> Cheers
> Anthony

Thomas.Salzberger at gmail.com
Thomas.Salzberger at wu.ac.at

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