The Crit coefficient in Mokken scale analysis: a simulation study and an application in quality-of-life research.

ABSTRACT:

Purpose

In Mokken scaling, the Crit index was proposed and is sometimes used as evidence (or lack thereof) of violations of some common model assumptions. The main goal of our study was twofold: To make the formulation of the Crit index explicit and accessible, and to investigate its distribution under various measurement conditions.

Methods

We conducted two simulation studies in the context of dichotomously scored item responses. We manipulated the type of assumption violation, the proportion of violating items, sample size, and quality. False positive rates and power to detect assumption violations were our main outcome variables. Furthermore, we used the Crit coefficient in a Mokken scale analysis to a set of responses to the General Health Questionnaire (GHQ-12), a self-

SUBMITTER: Crisan DR 

PROVIDER: S-EPMC8800923 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature