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Related Experiment Videos

Development of a three-scale MMPI: the MMPI-TRI

S C Swanson1, D I Tmepler, S Thomas-Dobson

  • 1California School of Professional Psychology-Fresno, USA.

Journal of Clinical Psychology
|May 1, 1995
PubMed
Summary

A new 60-item short form, the MMPI-TRI, was developed with high validity. This tool features three scales (Subjective Distress, Acting-Out, Psychosis) and shows strong psychometric properties for clinical assessment.

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Area of Science:

  • Psychometrics
  • Clinical Psychology
  • Psychological Assessment

Background:

  • The Minnesota Multiphasic Personality Inventory (MMPI) is a widely used psychological assessment tool.
  • Development of shorter, valid forms of established psychometric instruments is crucial for efficient clinical application.
  • Existing MMPI forms may require lengthy administration times, posing challenges in certain clinical settings.

Purpose of the Study:

  • To develop and validate a concise 60-item short form of the MMPI, named the MMPI-TRI.
  • To ensure the new short form retains high content validity and utilizes items present in both MMPI and MMPI-2.
  • To establish the psychometric properties, including internal consistency and discriminant validity, of the MMPI-TRI scales.

Main Methods:

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  • Development of a 60-item scale comprising three 20-item subscales: Subjective Distress, Acting-Out, and Psychosis.
  • Assessment of internal consistency and inter-scale independence for the MMPI-TRI scales.
  • Correlational analyses with established MMPI/MMPI-2 scales, content scales, supplementary scales, and four other psychometric instruments to establish validity.
  • Examination of scale performance across distinct clinical groups (anxiety/depression, prison inmates, psychotic disorders).

    • Main Results:

    • The MMPI-TRI demonstrated high content validity and included items common to MMPI and MMPI-2.
    • The three scales (Subjective Distress, Acting-Out, Psychosis) exhibited excellent internal consistency and sufficient independence.
    • Distinct clinical groups showed highest mean scores on corresponding scales: anxiety/depression on Subjective Distress, inmates on Acting-Out, and psychotic groups on Psychosis.
    • Correlations with other measures provided strong evidence for the validity of the MMPI-TRI.

    Conclusions:

    • The MMPI-TRI is a psychometrically sound 60-item short form of the MMPI, suitable for efficient psychological assessment.
    • The instrument's three scales effectively differentiate between various clinical presentations.
    • The MMPI-TRI offers a valid and reliable alternative for situations requiring a brief yet comprehensive personality assessment.