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t13.01.s02psychometricsirtmodelfromicc.mp3 (T13.01.S02 Psychometrics Choosing an IRT Logistic Model from ICCs)
Each logistic model (1PL, 2PL or 3PL) presents a definite way of Item Characteristic Curve. How to identify which logistic model to apply based on the ICC graphs? This podcast explains how to choose the logistic model based on the ICC graphs on slide 2 in the document T13.01.

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