Personality testing and epilepsy: comparison of two MMPI-2 correction procedures.

Area of Science:

• Neuropsychology
• Clinical Psychology

Background:

• The Minnesota Multiphasic Personality Inventory-2 (MMPI-2) is a standard tool for psychopathology assessment.
• Its reliability in individuals with neurologic conditions, particularly epilepsy, is a concern due to symptom overlap.
• Seizure experiences in epilepsy can mimic or suggest psychopathology, potentially affecting MMPI-2 validity.

Purpose of the Study:

• To evaluate the impact of correction procedures on MMPI-2 scores in individuals with epilepsy.
• To determine if score adjustments enhance the specificity of the MMPI-2 for this population.

Main Methods:

• The MMPI-2 was administered to 27 subjects diagnosed with epilepsy.
• Three correction procedures were applied: rational, statistical, and combined.
• Scores were compared before and after the application of each correction method.

Main Results:

• Statistical correction yielded clinically significant T-score changes (≥5 points) in two MMPI-2 clinical scales.
• A combined correction procedure resulted in significant changes in three clinical scales.
• For patients with intractable epilepsy, two elevated T-scores normalized after statistical and combined corrections.

Conclusions:

• Standard MMPI-2 scores require cautious interpretation in patients with epilepsy.
• Correction procedures, particularly statistical and combined methods, demonstrate potential for improving MMPI-2 score interpretation in epilepsy.
• Further research is warranted to validate these correction techniques for neuropsychological assessments in epilepsy.