Misfits: People and their problems. What might it all mean?

David D Curtis

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)
    23 Downloads (Pure)


    In the analysis of data, which arise from the administration of multiple choice tests or survey instruments and which are assumed to conform to a measurement model such as Rasch, it is normal practice to check item fit statistics in order to ensure that the items used in the instrument cohere to form a unidimensional trait measure. However, checking whether individuals also fit the measurement model appears to be less common. It is shown that poor person-fit compromises item parameter estimates and so it is argued that person-fit should be checked routinely in the calibration of instruments and in scoring individuals. Unfortunately, the meanings that can be ascribed to person-fit statistics for attitude instruments is not clear. A proposal for seeking the required clarity is developed.
    Original languageEnglish
    Pages (from-to)91-99
    Number of pages9
    JournalInternational Education Journal
    Issue number4
    Publication statusPublished - Nov 2001


    • Item Response Theory
    • Rasch analysis
    • person-fit statistics
    • attitude


    Dive into the research topics of 'Misfits: People and their problems. What might it all mean?'. Together they form a unique fingerprint.

    Cite this