Hi Lee,
If you go to my web page for Latent Trait and Item Response Theory (IRT)
Models,
http://ourworld.compuserve.com/homepages/jsuebersax/lta.htm
(please let me know if this link doesn't work)
that will point to several other pages that might help.
Then the IRT curve that I am
Hi all,
I am working on a dissertation that analyzes some international tests of
mathematics achievement. I need to use the responses (which can be
considered "correct"/"incorrect") and estimate an IRT (Item Response Theory)
model to describe the test.
In a nutshell, assume the test measures a
