Abstract
The two-parameter logistic model is among other things characterized by conditional independence and the absence of differential item functioning. Two fit statistics are proposed that can be used to investigate conditional independence and differential item functioning globally and at the item level. The statistics are evaluated using their posterior predictive distribution.
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Hoijtink, H. (2001). Conditional Independence and Differential Item Functioning in the Two-Parameter Logistic Model. In: Boomsma, A., van Duijn, M.A.J., Snijders, T.A.B. (eds) Essays on Item Response Theory. Lecture Notes in Statistics, vol 157. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-0169-1_6
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DOI: https://doi.org/10.1007/978-1-4613-0169-1_6
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