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This study represents and investigates the relationship between the item discrimination parameters of some polytomous item response theory models. The specific models chosen are the graded response model proposed by Samejima in 1969, the generalized partial credit model (Muraki, 1992), and the acceleration model (Samejima, 1995). The relationship between the item discrimination parameters of these models is explored with some algebraic operations and the relationship is also examined with data analysis of simulated data sets.
Generalized Partial Credit Model, Item Discrimination, Item Response Theory
Date of Defense
June 28, 2010.
A Thesis submitted to the Department of Educational Psychology and Learning Systems in partial fulfillment of the requirements for the degree of Master of Science.
Includes bibliographical references.
Akihito Kamata, Professor Co-Directing Thesis; Betsy Jane Becker, Professor Co-Directing Thesis; Yanyun Yang, Committee Member; Gershon Tenenbaum, Committee Member.
Florida State University
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