Calculating DIF

[tpg]

I am confused and hope someone can help me.

In creating a "model item - gender + item*gender" - how do I compare the item paramenters for the two gender groups?

thx

[acerlel]

Hi,
you should pay attention to the output of item*gender. The gender DIF magnitute for each item is the difference between the parameter estimated values by males and females on the item (from the output).
Regards
Luc

luc.le@acer.edu.au