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Direct linkDeCarlo, Lawrence T. – Applied Psychological Measurement, 2012
In the typical application of a cognitive diagnosis model, the Q-matrix, which reflects the theory with respect to the skills indicated by the items, is assumed to be known. However, the Q-matrix is usually determined by expert judgment, and so there can be uncertainty about some of its elements. Here it is shown that this uncertainty can be…
Descriptors: Bayesian Statistics, Item Response Theory, Simulation, Models
