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Revsbech R, Mortensen EL, Owen G, et al. Exploring rationality in schizophrenia. BJPsych Open. 2015;1(1):98-103doi: 10.1192/bjpo.bp.115.000224.
Revsbech, R., Mortensen, E. L., Owen, G., Nordgaard, J., Jansson, L., Sæbye, D., Flensborg-Madsen, T., & Parnas, J. (2015). Exploring rationality in schizophrenia. BJPsych open, 1(1), 98-103. https://doi.org/10.1192/bjpo.bp.115.000224
Revsbech, Rasmus, et al. "Exploring rationality in schizophrenia." BJPsych open vol. 1,1 (2015): 98-103. doi: https://doi.org/10.1192/bjpo.bp.115.000224
Revsbech R, Mortensen EL, Owen G, Nordgaard J, Jansson L, Sæbye D, Flensborg-Madsen T, Parnas J. Exploring rationality in schizophrenia. BJPsych Open. 2015 Sep 22;1(1):98-103. doi: 10.1192/bjpo.bp.115.000224. eCollection 2015 Jun. PMID: 27703730; PMCID: PMC4998928.
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BJPsych Open. 2015 Sep 22;1(1):98-103. doi: 10.1192/bjpo.bp.115.000224. eCollection 2015 Jun.

Exploring rationality in schizophrenia.

BJPsych open

Rasmus Revsbech, Erik Lykke Mortensen, Gareth Owen, Julie Nordgaard, Lennart Jansson, Ditte Sæbye, Trine Flensborg-Madsen, Josef Parnas

Affiliations

  1. , MSc, PhD, Psychiatric Center Hvidovre & Glostrup Forensic Psychiatric Department, University of Copenhagen, Denmark.
  2. , MSc, Department of Public Health and Center for Healthy Aging, University of Copenhagen, Denmark.
  3. , BSc, PhD, MBBS, MRCPsych, Institute of Psychiatry, Psychology and Neuroscience, Department of Psychological Medicine, Weston Education Centre, UK.
  4. , MD, PhD, Department of Psychiatric Research, Region Zealand, Denmark.
  5. , MD, Psychiatric Center Hvidovre, Denmark.
  6. , MSc, Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospital, The Capital Region, Denmark.
  7. , MSc, PhD, Unit of Medical Psychology, Institute of Public Health, University of Copenhagen, Denmark.
  8. , MD, Dr Med, Psychiatric Center Hvidovre, Center for Subjectivity Research, University of Copenhagen, Denmark.

PMID: 27703730 PMCID: PMC4998928 DOI: 10.1192/bjpo.bp.115.000224

Abstract

BACKGROUND: Empirical studies of rationality (syllogisms) in patients with schizophrenia have obtained different results. One study found that patients reason more logically if the syllogism is presented through an unusual content.

AIMS: To explore syllogism-based rationality in schizophrenia.

METHOD: Thirty-eight first-admitted patients with schizophrenia and 38 healthy controls solved 29 syllogisms that varied in presentation content (ordinary

RESULTS: Controls outperformed patients on all syllogism types, but the difference between the two groups was only significant for valid syllogisms presented with unusual content. However, when adjusting for intelligence and neuropsychological test performance, all group differences became non-significant.

CONCLUSIONS: When taking intelligence and neuropsychological performance into account, patients with schizophrenia and controls perform similarly on syllogism tests of rationality.

DECLARATION OF INTEREST: None.

COPYRIGHT AND USAGE: © The Royal College of Psychiatrists 2015. This is an open access article distributed under the terms of the Creative Commons Non-Commercial, No Derivatives (CC BY-NC-ND) licence.

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