A comparison of reading and demographic-based estimates of premorbid intelligence in schizophrenia

Schizophrenia Research
J I TracyC A Monaco

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 (t[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 dete...Continue Reading

References

Jun 1, 1978·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·H E Nelson, A O'Connell
Jul 1, 1992·The British Journal of Psychiatry : the Journal of Mental Science·J R CrawfordK Kirkwood
Aug 1, 1988·The British Journal of Psychiatry : the Journal of Mental Science·J R CrawfordJ A Besson
Jan 1, 1988·Schizophrenia Research·R M BilderS Mukherjee
May 1, 1988·The British Journal of Clinical Psychology·J R CrawfordJ A Besson
Nov 1, 1987·The British Journal of Clinical Psychology·R E O'CarrollJ E Whittick
Sep 1, 1981·Brain and Language·E Goldberg, L D Costa
May 1, 1995·Schizophrenia Research·J R DeQuardoL Kim

❮ Previous
Next ❯

Citations

Nov 1, 2002·Schizophrenia Research·Lisa J PhillipsPatrick D McGorry
Feb 18, 2006·Journal of Clinical and Experimental Neuropsychology·Philip D HarveyKenneth L Davis
Jan 20, 2011·The Clinical Neuropsychologist·Fiona H Barwick, Peter A Arnett
Apr 24, 2009·Schizophrenia Bulletin·Jimmy ChoiAlice Medalia
Nov 1, 2013·Wiley Interdisciplinary Reviews. Cognitive Science·Philip D Harvey

❮ Previous
Next ❯

Related Concepts

Related Feeds

Antipsychotic Drugs

Antipsychotic drugs are a class of medication primarily used to manage psychosis (including delusions, hallucinations, paranoia or disordered thought), principally in schizophrenia and bipolar disorder. Discover the latest research on antipsychotic drugs here