[Rasch] Deciding Items are Identical

Tom Conner connert at msu.edu
Sat Dec 11 08:44:15 EST 2010

Consider that you have a set of items, in my case vignettes, that are 
superficially different but you would like them to all have the same 
item difficulty within error.  How do you test for that?  The responses 
to the vignettes are polytomous.


Tom Conner
Professor of Sociology
Michigan State University
office: 517 355-1747
cell: 517 230-0343
"What if there were no hypothetical questions?"

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