[Rasch] Rasch S.E at the cut score...reciprocal?

Thomas Salzberger thomas.salzberger at gmail.com
Fri Nov 1 23:51:43 EST 2013


2013/11/1 Imogene Rothnie <imogene.rothnie at sydney.edu.au>

>  Thanks Thomas, ****
>
> And thanks for the clarification of the information..I had just read that
> in RMT and forgotten about it!****
>
> ** **
>
> I THOUGHT I should be using the S.E. of the ITEM at the location of the
> pass standard because most things I have read indicate reading the S.E. off
> the logit in the score table (20.3 in Winsteps) that corresponds with the
> cut score , but once you add and subtract that S.E. from the cut score
> measure you don’t have a direct raw score comparison of the borderzone
> range. ****
>
> ** **
>
> So this seems a very basic error , and logically I guess using the Person
> S.E. at the cut point measure is really telling you how much precision the
> test gives you about student ability at that level, yes?    ****
>
> ** **
>
> **
>

I would think so.

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