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KMID : 0376619930180010036
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Seoul Journal of Psychiatry
1993 Volume.18 No. 1 p.36 ~ p.49
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The Degree of Ego Impairment in Schizophrenia, Borderline Personality Disorder and Depression-A Validation Study on the Ego Impairment Index of the Rorschach-
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Abstract
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This study was designed to ascertain the validity and the clinical utility of the Ego Impairment Index(EII) in three groups of schizophrenics, borderline personality disorders. and depressives. The index is theoretically based on Beres'(1956)
model
of
ego assessment and was empirically developed by Perry and Viglione(1991) in order to assess the degree of ego impairment In this study three groups of patients ware bested by the Rorschach and the MMPI The issues of this study are as follows:
first, how
much the EII component variables are correlated and how many factors are derived from the principal component analysis; second, whether schizophrenics demonstrate greater ego impairment than BPD patients and the degree of disturbance of BPD
patients is
greater than that of depressives; third, what MMPI scales are significantly correlated with the EII; fourth, the degree of diagnostic discriminating power of the EII component variables. It was found that, as expected, 1) the EII component
variables
were significantly interrelated(range: r=499-810) and a single factor factor was derived from the principal component analysis. In addition, the interscorer reliability was 94(range:r=89-99); the degree of ego impairment was greater in
schizophrenics
than in BPD patients who demonstrated greater impairment than depressives; 3) the MMPI scales F, 6, 8, 9 were significantly positively and scale K was significantly negatively correlated with the EII But Barron(1953)s ego strength scale of the
MMPI
was
not correlated with the index; 4) as results of multiple discriminant function analysis, two discriminant functions were obtained, and the correct discriminating mean power of these two discriminant functions was 85% These results were very
similar
to
those of Perry et al. (1991, 1992) in schizophrenics and depressives respectively. To summarize, the number of the EII was one, and both the validity and the clinical utility of the index were confirmed. Therefore, these results offer support for
the
use of the EII as an empirical means of assessing the degree of ego impairment The suggestions and limitations of this study were discussed in terms of the diagnosis, prognosis, and treatment of mental disorders. Specially, further study is
needed
to
examine the relationship between treatment outcome and the degree of ego impairment as well as to cross-validate the predictive power of two discriminant functions which were obtained from this study.
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KEYWORD
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