Date:         Wed, 10 Sep 1997 10:14:34 -0400
Reply-To:     Abdalla Abdel Ghafour Al Smadi <aa118585@OAK.CATS.OHIOU.EDU>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         Abdalla Abdel Ghafour Al Smadi <aa118585@OAK.CATS.OHIOU.EDU>
Subject:      equating question
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi everybody:
I am doing a differential item functioning(DIF) study. I know that if
two forms of a test gevin to two samples of people we need to equate
scores of one form to be on the same scale as the other form.
My question:
 
What if we have the same group of items gevin to two groups of people, do
we still need to equate before analizing for DIF ???
 
thanks                  abdalla