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A Comparison of Alternative Proposed Subscale Structures for MMPI Scale 2.

I H Bernstein, C P Garbin

Multivariate Behavioral Research

|January 16, 2016

Summary

This study examined subscales of the Minnesota Multiphasic Personality Inventory (MMPI) Scale 2. Findings suggest proposed subscales do not improve upon using the entire MMPI Scale 2, as factors appear nonsubstantive.

Area of Science:

Psychological assessment
Psychometrics
Personality research

Background:

The Minnesota Multiphasic Personality Inventory (MMPI) is a widely used psychological assessment tool.
Scale 2 of the MMPI has several proposed subscale structures that aim to provide more nuanced interpretations.
Understanding the factor structure of MMPI Scale 2 is crucial for accurate personality assessment.

Purpose of the Study:

To evaluate the empirical validity of proposed subscale structures for MMPI Scale 2.
To investigate the impact of item endorsement probability on the factor structure of MMPI Scale 2.
To determine if existing subscale systems offer advantages over using MMPI Scale 2 as a whole.

Main Methods:

Confirmatory Oblique Multiple Groups factor analysis was applied to MMPI Scale 2 data.

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Procedures followed established methodologies (Bernstein & Eveland, 1982).

Evaluated subscales proposed by Comrey (1957), Harris & Lingoes (1955), and Weiner (1948) in Job Applicant and Psychotherapy Outpatient populations.

Main Results:

None of the evaluated subscale structures adequately explained the item-level structure of MMPI Scale 2.
Differences in item endorsement probability (response level) did not improve the fit of proposed subscales.
The factor structure of MMPI Scale 2 appears to be influenced by nonsubstantive item interrelationships.

Conclusions:

The proposed subscale systems for MMPI Scale 2 do not offer significant advantages over using the scale in its entirety.
Existing subscale structures fail to capture meaningful substantive variance within MMPI Scale 2.
Further research may be needed to develop more valid and interpretable subscales for MMPI Scale 2.