Item-content bias on scale 1 of the MMPI-2, and the development of stroke-related subscales

Date of Award




Degree Name

Doctor of Philosophy (Ph.D.)



First Committee Member

Donald K. Routh - Committee Chair


The response characteristics of stroke and psychiatric patients on MMPI Scale 1 items were examined. It was hypothesized that it would be possible to identify a subset of these items which would have neurologic/stroke-related content, and that these items would be useful in testing the hypothesis that these two populations respond to these items for different reasons: Stroke patients endorse these items as valid symptom reporting, whereas psychiatric patients endorse these items as indicators of psychopathology.A factor analysis of the Scale 1 items with the MMPI-2 Male Normative sample, a psychiatric sample from a Minnesota VAMC, and a stroke sample from the Miami VAMC was conducted. Results indicated near-congruent models for the normative and psychiatric samples. The normative sample and the stroke sample did not share a factor model, nor was an adequate model found for the stroke sample by itself.An examination of T-score elevations on subscales constructed from the normative sample's factor structure and from a rational examination of the item content revealed no significant differences between the stroke and psychiatric samples, nor were there significant differences in elevations within either sample.Correlations of the newly-constructed subscales and MMPI-2 measures of affective distress were examined. Correlations between the neurologic/stroke-related subscales and measures of distress were generally significant for both samples. No significant differences were found between the stroke and psychiatric samples on these correlations.Suggestions for future research with this instrument are given.


Psychology, Clinical; Psychology, Personality; Psychology, Psychometrics

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