A Five-Year Follow-up on the Temporal Stability of the Ego Impairment Index

William Perry · Amanda McDougall · Donald J. Viglione

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Psychological Testing and Assessment Psychometric Methodologies and Testing Personality Traits and Psychology

Abstract

This study investigated the temporal stability of the Ego Impairment Index (EII) over a 5-year period. The EII is based on the Comprehensive System (Exner, 1993) and has shown promise as a measure of internal disturbance and psychopathology (Perry & Braff, 1994; Perry & Viglione, 1991; Perry, Viglione, & Braff, 1992). This study successfully recalled 17 subjects from an original sample of 46 who initially suffered from Major Depression, Melancholic-Type 5 years earlier and were treated with antidepressant medication. These subjects did not differ significantly from those Subjects who were not successfully recalled. The Rorschach and a variety of other measures were administered to the subjects. The results revealed impressive temporal consistency over 5 years: a rank-order, test-retest correlation of .68. The EII was also correlated with some of the measures of overall adaptation. These results are consistent with the notion that the EII is a stable trait-measure of psychopathology. Limitations because of the small subgroup of subjects, although not unusual in longitudinal research, are noted.

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References

1981Diagnostic and Statistical Manual of Mental Disorders, 3rd ed 1980Diagnostic and Statistical Manual of Mental Disorders, 3rd ed 1966The Minnesota Multiphasic Personality Inventory 2010Rorschach Comprehensive System 2017MINNESOTA MULTIPHASIC PERSONALITY INVENTORY‐2 1993The Rorschach: A comprehensive system: Basic foundations, Vol. 1, 3rd ed.2013Psychodiagnosis in Schizophrenia 1991The Ego Impairment Index as a Predictor of Outcome in Melancholic Depressed Patients Treated With Tricyclic Antidepressants

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1999The Rorschach: Toward a nomothetically based, idiographically applicable configurational model.2002Empirical support for interrater reliability of Rorschach Comprehensive System coding 2003The Use of the Ego Impairment Index Across the Schizophrenia Spectrum 2010A Meta‐Analysis of the relationship between the Rorschach Ego Impairment Index (EII) and psychiatric severity 2006A Rorschach Stability Study in a Nonpatient Adult Sample

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