The MMPI-2 in chronic psychiatric illness

Area of Science:

• Psychiatry
• Psychological Assessment
• Clinical Psychology

Background:

• Previous MMPI-2 studies often mixed early-stage and chronic psychiatric patients.
• The impact of illness chronicity on MMPI-2 profiles remains underexplored.
• Demoralization associated with long-term illness may influence MMPI-2 results.

Purpose of the Study:

• To investigate the differential effects of chronicity on MMPI-2 profiles in schizophrenia and depression.
• To assess the influence of demoralization on MMPI-2 scales in long-term psychiatric patients.
• To compare MMPI-2 outcomes between chronic schizophrenia, chronic depression, and healthy individuals.

Main Methods:

• Utilized the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) in three groups: 30 long-term schizophrenia patients, 30 long-term depression patients, and 30 healthy controls.
• Compared groups on both the MMPI-2 Clinical Scales and Restructured Clinical (RC) Scales.
• Analyzed differences in scale scores and demoralization levels across the groups.

Main Results:

• Schizophrenia patients differed from depression patients on 14 MMPI-2 scales and from healthy controls on 10 scales, with mean UT-scores generally below 65 (near-normal functioning).
• Depression patients differed from healthy controls on 17 scales, with most UT-scores above 65 (indicating impaired functioning).
• Demoralization was significantly higher in depression patients compared to schizophrenia patients, with both patient groups showing higher demoralization than healthy controls.

Conclusions:

• Long-term patients with depression exhibit impaired functioning and elevated demoralization.
• Surprisingly, long-term schizophrenia patients demonstrate near-normal functioning and lower demoralization levels.
• Illness chronicity significantly impacts MMPI-2 profiles and demoralization, suggesting distinct long-term trajectories for schizophrenia and depression.