**Links**

http://ourworld.compuserve.com/homepages/jsuebersax/lta.htm

*John Uebersax's webpage which provides
background information on IRT (latent trait analysis--LTA). Sections
include: What LTA Can Do, Basic Readings, Issues (model choice), and
Links. A section on latent trait models for rater agreement is also given.*

http://www.uts.psu.edu/Item_Response_Theory_frame.htm

*Penn State's University Test Center.
This page includes a basic description of classical test theory compared to IRT
and includes background information on the 3PL, estimating ability, and test
construction.*

http://www.uts.psu.edu/Classical_theory_frame.htm

*This is a similar page that describes
classical test theory.*

http://luna.cas.usf.edu/~mbrannic/files/pmet/irt.htm

*Dr. Michael Brannick's homepage. This
includes a description of IRT that is based on the 3PL. There are nice
illustrations on how various parameters determine the shape of the 3PL item
response function. *

http://www.rasch.org/

*This is the site to check out for Rasch
modeling and related applications. It is run by the Institute for
Objective Measurement at the University of Chicago Highly recommended!*

**Annotated Bibliography**

General Introductions

Drasgow,
F., & Hulin, C. L. (1990).
Item response theory. In M.
D. Dunnette & L. M. Hough (Eds.), __Handbook of Industrial and
Organizational Psychology, Vol. I__ (pp. 577-636).
Palo Alto, CA: Consulting Psychologists Press.

*A
very good introduction to IRT. This chapter covers all of the basics
including models, estimation, applications, the like. Applications are
geared to industrial-organizational psychologists, though, this chapter would be
an appropriate introduction for most audiences. Unlike most introductions
to IRT, this chapter includes discussion of non-parameteric models and
appropriateness measurement. *

Hambleton,
R. K., & Swaminathan, H. (1985).
__Item response theory: Principles and applications__.
Boston: Kluwer-Nijhoff.

Hambleton,
R. K., Swaminathan, H., Rogers, H. J. (1991).
__Fundamentals of Item Response Theory__.
Newbury Park, NJ: Sage.

*This
is a great, cheap introduction to IRT. This is often the first source that
I suggest to students when they express interest in IRT. Basic concepts
are covered. *

Lord,
F. M. (1980).
__Applications of item response theory to practical testing problems__.
Hillsdale, NJ: Erlbaum.

*This
book is easier to read than Lord & Novick (1968) though it is outdated in
many places. Material includes concise descriptions of classical test
theory and IRT and descriptions of applications of IRT. These include
tailored testing, mastery testing, estimating ability, equating, test bias, and
others. The application chapters are excellent in providing a good
foundation but are outdated given the advances that have been made since the
book was initially published.
*

Lord,
F. M., & Novick, M. (1968). __Statistical theories of mental test scores__.
Reading, MA: Addison-Wesley.

*The
classic treatment on classical test theory. A very challenging read,
though well worth spending time with. Advanced graduate students
only. The last section of the book includes material written by Birnbaum
on the dichotomous logistic models. Unfortunately this book is out
of print.*

Zickar,
M. J. (1998).
Modeling item-level data with item response theory.
__Current Directions in Psychology, 7,__ 104-109.

*A
quick and dirty introduction to IRT written for a non-measurement
audience. Appropriate for an applied measurement seminar with minimal
discussion on IRT. For more in-depth treatment of IRT, there are better
introductions. *