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Direct linkLi, Feiming; Cohen, Allan S.; Kim, Seock-Ho; Cho, Sun-Joo – Applied Psychological Measurement, 2009
This study examines model selection indices for use with dichotomous mixture item response theory (IRT) models. Five indices are considered: Akaike's information coefficient (AIC), Bayesian information coefficient (BIC), deviance information coefficient (DIC), pseudo-Bayes factor (PsBF), and posterior predictive model checks (PPMC). The five…
Descriptors: Item Response Theory, Models, Selection, Methods
Gerretson, Helen; Bosnick, Janet; Schofield, Kathleen – Teacher Educator, 2008
The purpose of this study was to identify factors associated with the growing use of teacher specialists in the elementary schools, particularly in the area of mathematics. The elementary school principals of a large metropolitan school district located in northeastern Florida responded to an online survey that focused on the type of specialist…
Descriptors: Elementary Schools, Models, Specialists, Team Teaching
