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Direct linkPreston, Kathleen; Reise, Steven; Cai, Li; Hays, Ron D. – Educational and Psychological Measurement, 2011
The authors used a nominal response item response theory model to estimate category boundary discrimination (CBD) parameters for items drawn from the Emotional Distress item pools (Depression, Anxiety, and Anger) developed in the Patient-Reported Outcomes Measurement Information Systems (PROMIS) project. For polytomous items with ordered response…
Descriptors: Item Response Theory, Models, Item Banks, Rating Scales
