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
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.
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:
- 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.