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Development and validation of a method for deriving MMPI-3 scores from MMPI-2/MMPI-2-RF item responses.
Jacob R Brown1, William H Menton2, Yossef S Ben-Porath1
1Kent State University, Department of Psychological Science.
Psychological Assessment
|October 28, 2024
Summary
The Minnesota Multiphasic Personality Inventory-3 (MMPI-3) can be scored using older MMPI-2/MMPI-2-RF data. This method allows for psychometrically comparable prorated scores for 24 MMPI-3 scales, expanding research possibilities.
Area of Science:
- Psychological assessment
- Psychometrics
- Personality testing
Background:
- The Minnesota Multiphasic Personality Inventory-3 (MMPI-3) was developed to enhance the MMPI-2-Restructured Form (MMPI-2-RF) and update norms.
- Most MMPI-3 items are derived from the MMPI-2-RF, allowing for potential scoring from older protocols.
Purpose of the Study:
- To develop and validate a procedure for deriving MMPI-3 scores from MMPI-2/MMPI-2-RF protocols.
- To examine the psychometric properties and comparability of prorated MMPI-3 scores.
Main Methods:
- A prorating procedure was developed based on criteria including item representation, scale correlation (r ≥ .90), and comparable T score statistics.
- Excluded scales that did not meet psychometric criteria, such as non-content-based Validity Scales and Specific Problems Scales.
Main Results:
- A procedure was established to derive psychometrically comparable prorated scores for 24 of the 52 MMPI-3 scales from MMPI-2/MMPI-2-RF data.
- 16 MMPI-3 scales can be fully scored, and 24 can be prorated, with evidence supporting score comparability.
Conclusions:
- The developed prorating procedure enables the study of 40 MMPI-3 scales using archival MMPI-2/MMPI-2-RF data.
- This method enhances the utility of older MMPI data for research involving the MMPI-3.
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