The Use of the Ego Impairment Index Across the Schizophrenia Spectrum

William Perry · Arpi Minassian · Kristin S. Cadenhead · Joyce Sprock · DAVID L. BRAFF

42 citations0/0 files storedJournal of Personality Assessment

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Psychological Testing and Assessment Schizophrenia research and treatment Mental Health and Psychiatry

Abstract

The goal of this study was to assess perceptual and thought disturbance, as indexed by the Ego Impairment Index (EII; Perry & Viglione, 1991), a Rorschach-derived measure, across the schizophrenia spectrum. We hypothesized that there would be an increase in EII scores (indicating increased disturbance) across the spectrum from nonpatients to severely disturbed, hospitalized schizophrenia patients. Normal comparison participants (n = 66), students with elevated scores on either the Perceptual Aberration/Magical Ideation or the Physical Anhedonia Scales (n = 24), first-degree relatives of schizophrenia patients (n = 36), participants diagnosed with Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM-IV]; American Psychiatric Association, 1994) schizotypal personality disorder (n = 36), outpatient schizophrenia participants (n = 33), and hospitalized schizophrenia patients (n = 56) were studied. As hypothesized, we found increased EII scores in all of the schizophrenia spectrum groups when compared against normal comparison participants. Furthermore, the EII was significantly different between the schizophrenia patients and the other schizophrenia spectrum groups. These findings support the use of the EII as a sensitive measure of perceptual and thought disturbance across the schizophrenia spectrum that yields specific information regarding the type of thinking problems that occur within schizophrenia spectrum subgroups.

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References

1981Diagnostic and Statistical Manual of Mental Disorders, 3rd ed 1980Diagnostic and Statistical Manual of Mental Disorders, 3rd ed 1955Manual for the Wechsler Adult Intelligence Scale.2010Rorschach Comprehensive System 1988The Brief Psychiatric Rating Scale (BPRS): Recent developments in ascertainment and scaling.2000Contrasts and Correlations in Effect-Size Estimation 1988The brief psychiatric rating scale (BPRS) : Recent developments in ascertainment and scaling. Introduction 1991The Ego Impairment Index as a Predictor of Outcome in Melancholic Depressed Patients Treated With Tricyclic Antidepressants

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2008Amygdalar enlargement associated with unique perception 2010A Meta‐Analysis of the relationship between the Rorschach Ego Impairment Index (EII) and psychiatric severity 2004A Consideration of Challenges to Psychological Assessment Instruments Used in Forensic Settings: Rorschach As Exemplar 2007The Rorschach Perceptual-Thinking Index (PTI): An Examination of Reliability, Validity, and Diagnostic Efficiency 2004Association of Rorschach and MMPI Psychosis Indicators and Schizophrenia Spectrum Diagnoses in a Russian Clinical Sample

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