Uncertainty in Latent Trait Models

• Published in: Applied psychological measurement Vol. 44; no. 6; pp. 447 - 464
• Main Authors: Tutz, Gerhard, Schauberger, Gunther
• Format: Journal Article
• Language: English
• Published: Los Angeles, CA SAGE Publications 01.09.2020
• Subjects: ordinal data; partial credit model; rating scales; response styles; Rasch model; dispersion; heterogeneity
• ISSN: 0146-6216; 1552-3497; 1552-3497
• DOI: 10.1177/0146621620920932

A model that extends the Rasch model and the Partial Credit Model to account for subject-specific uncertainty when responding to items is proposed. It is demonstrated that ignoring the subject-specific uncertainty may yield biased estimates of model parameters. In the extended version of the model,...