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Item Response Theory (IRT). Based on models relating the latent ability (q) of an individual on a construct with the response of the individual to a single item.The three most popular models differ in terms of what information about the items is included (1PL, 2PL, 3PL).. Assumptions Underlying C
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1. Missing data and dimensionality assessment for item response data: A Monte Carlo comparison of methods Holmes Finch Brian French Ball State University Washington State University Jeffrey Trotter Ball State University