An IRT-Based Two-Wave Model for Studying Short-Term Stability in Personality Measurement

Abstract

This article describes an item response theorybased structural equation model that allows the short-term stability and the magnitude of retest effects to be assessed for some types of personality traits. The relations between the model estimates and the usual procedures for assessing invariance in IRT are described. An empirical application of the model is given, the substantive implications of the results are discussed, and suggestions for further research and methodological procedures are presented.