An extension of the rasch model for ratings providing both location and dispersion parameters

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

An elaboration of a psychometric model for rated data, which belongs to the class of Rasch models, is shown to provide a model with two parameters, one characterising location and one characterising dispersion. The later parameter, derived from the idea of a unit of scale, is also shown to reflect the shape of rating distributions, ranging from unimodal, through uniform, and then to U-shaped distributions. A brief case is made that when a rating distribution is treated as a random error distribution, then the distribution should be unimodal.

Original languageEnglish
Pages (from-to)105-113
Number of pages9
JournalPsychometrika
Volume47
Issue number1
DOIs
Publication statusPublished - 1 Mar 1982
Externally publishedYes

Fingerprint Dive into the research topics of 'An extension of the rasch model for ratings providing both location and dispersion parameters'. Together they form a unique fingerprint.

  • Cite this