[Rasch] Measures in Rasch Model

Juanito Talili talilij at yahoo.com
Sat Jun 21 13:26:01 EST 2008

Dear Rasch Modelers,
For a dichotomous case, the item measure is called "item difficulty" while the person measure is called "person ability".  I have a difficulty of understanding the measures for the polytomous(rating scale) case.  Can somebody have a kind heart to explain these things?
Thank you.
J. Talili

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