The One-Parameter Logistic Model Can Be True With Zero Probability for a Unidimensional Measuring Instrument: How One Could Go Wrong Removing Items Not Satisfying the Model
Educational and Psychological Measurement
Published online on August 06, 2025
Abstract
Educational and Psychological Measurement, Ahead of Print.
This note is concerned with the chance of the one-parameter logistic (1PL-) model or the Rasch model being true for a unidimensional multi-item measuring instrument. It is pointed out that if a single dimension underlies a scale consisting of dichotomous ...
This note is concerned with the chance of the one-parameter logistic (1PL-) model or the Rasch model being true for a unidimensional multi-item measuring instrument. It is pointed out that if a single dimension underlies a scale consisting of dichotomous ...