Journal article
A comparison of reading and demographic-based estimates of premorbid intelligence in schizophrenia
Schizophrenia research, v 22(2), pp 103-109
1996
PMID: 8958593
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Abstract
Estimating premorbid intelligence in schizophrenia is difficult because the illness affects aspects of premorbid and postmorbid functioning. We evaluated two qualitatively different estimates of premorbid intelligence in a sample of schizophrenia patients and tested whether: (1) the two indices were related and produced similar IQ estimates, and (2) either index was related to a measure of cognitive deterioration. The Barona Index (BI, a demographically-based instrument) and the National Adult Reading Test (NART, a reading test of irregularly-spelled words) were utilized. Subjects (
n=40) were adult neuroleptic-medicated inpatients with a DSM-III-R diagnosis of chronic schizophrenia (
n=35) or schizoaffective disorder (
n=5). Paired
t-tests revealed statistically equivalent BI and NART estimates for Full Scale and Verbal IQs, but significantly higher NART Performance IQs (ift[35] = −3.34, p > 0.01). Correlational analyses suggested the two indices were associated but shared modest variance. BI correlations revealed expected associations with education and social position. NART IQs were related to education and a measure of cognitive status. Regression analyses supported the association between NART estimates and cognitive deterioration. Results suggest BI may be a better estimate of premorbid intelligence in schizophrenia as it is less influenced by potential
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Details
- Title
- A comparison of reading and demographic-based estimates of premorbid intelligence in schizophrenia
- Creators
- Joseph I. Tracy - Norristown State HospitalAmy C. McGrory - Department of Psychiatry, Medical College of Pennsylvania/Eastern Pennsylvania Psychiatric Institute, Norristown State Hospital, Clinical Research Center, 3200 Henry Avenue, Philadelphia, PA 19129, USARichard C. Josiassen - Norristown State HospitalCatherine A. Monaco - Department of Psychiatry, Medical College of Pennsylvania/Eastern Pennsylvania Psychiatric Institute, Norristown State Hospital, Clinical Research Center, 3200 Henry Avenue, Philadelphia, PA 19129, USA
- Publication Details
- Schizophrenia research, v 22(2), pp 103-109
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Psychiatry
- Web of Science ID
- WOS:A1996VV90700002
- Scopus ID
- 2-s2.0-0030588950
- Other Identifier
- 991019167909904721
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Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Psychiatry