[Rasch] DIF test with 2-item scale

Randy and Shelley MacIntosh srmac at fastmail.com
Tue Jan 3 06:05:50 AEDT 2017

I have several two-item scales. I am guessing that it is impossible to 
test for DIF.
Is that correct?
Any suggested reading on the minimum number of items required to test 
for DIF in a Rasch model would be appreciated.

Randy MacIntosh

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