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Direct linkvan den Heuvel-Panhuizen, Marja; Robitzsch, Alexander; Treffers, Adri; Koller, Olaf – Psychometrika, 2009
This article discusses large-scale assessment of change in student achievement and takes the study by Hickendorff, Heiser, Van Putten, and Verhelst (2009) as an example. This study compared the achievement of students in the Netherlands in 1997 and 2004 on written division problems. Based on this comparison, they claim that there is a performance…
Descriptors: Academic Achievement, Measures (Individuals), Program Effectiveness, Foreign Countries
Lenk, Peter; Wedel, Michel; Bockenholt, Ulf – Psychometrika, 2006
This paper presents a hierarchical Bayes circumplex model for ordinal ratings data. The circumplex model was proposed to represent the circular ordering of items in psychological testing by imposing inequalities on the correlations of the items. We provide a specification of the circumplex, propose identifying constraints and conjugate priors for…
Descriptors: Bayesian Statistics, Models, Psychological Testing, Correlation
Peer reviewedvan Buuren, Stef; van Rijckevorsel, Jan L. A. – Psychometrika, 1992
A technique is presented to transform incomplete categorical data into complete data by imputing appropriate scores into missing cells. A solution of the optimization problem is suggested, and relevant psychometric theory is discussed. The average correlation should be at least 0.50 before the method becomes practical. (SLD)
Descriptors: Classification, Computer Simulation, Correlation, Equations (Mathematics)
