Tuesday, March 20, 2007

PEM Pre-Conference Workshop at NCME

With no small amount of pride, I would like to point loyal blog readers to the NCME Pre-Conference Workshops where our very own Dr. Ye Tong will be conducting a workshop on Vertical Scaling. Dr. Tong will be supporting her major advisor Dr. Michael Kolen and the venue will be sure to tell you more about vertical scaling than you had ever hoped for! Just check out the abstract taken from the NCME online program:

Vertical Scaling

Presenters: Michael Kolen, University of Iowa; Ye Tong, Pearson Educational Measurement

The potential need for constructing a vertical scale arises whenever a testing program has multiple grade levels and wishes to have a common scale to compare test scores across these grade levels. Vertical scaling uses statistical process to place test scores that measure similar content domain but at different educational levels onto a common scale. The goals of the session are for attendees to be able to understand the principles of vertical scaling, to conduct vertical scaling and to interpret the results of vertical scaling in reasonable ways. Vertical scaling will be contrasted with related equating and linking processes. Traditional and IRT vertical linking methodologies will be described and practical issues will be discussed. The focus is on developing a conceptual understanding of vertical scaling through numerical examples and discussion of practical issues. Importance and challenges related to vertical scaling will be included. The text for the session is a chapter in Kolen and Brennan’s (2004) “Test Equating, Scaling, and Linking. Methods and Practices (Second Edition).”
Register Now!

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