ISSN 2043-8087
Journal of Experimental Psychopathology
 Volume 4, Issue 4, 405-419, 2013
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Negative Priming in Obsessive-Compulsive Disorder and Schizophrenia: Association with Symptom Patterns

Authors
Norbert Kathmann(a),(c), Bettina Bogdahn(b),(c), Tanja Endrass(a),(d)
(a) Department of Psychology, Humboldt University, Berlin, Germany
(b) Private Practice, Munchen, Germany
(c) Department of Psychiatry and Psychotherapy, Ludwig-Maximilians University, Munchen, Germany
(d) Department of Psychology, Otto-von-Guericke University, Magdeburg, Germany.

Volume 4, Issue 4, 2013, Pages 405-419
DOI: http://dx.doi.org/10.5127/jep.031512

Abstract
Negative priming (NP) is assumed to indicate the effect of an inhibitory mechanism in selective attention. Previous studies showed inconsistent reductions of the NP effect in patients with obsessive-compulsive disorder (OCD) and schizophrenia. The aim of the present study was to relate NP alterations in two different NP tasks with specific symptom patterns of OCD and schizophrenia patients. Twenty-eight patients with a diagnosis of OCD, 27 patients with schizophrenia, and 27 healthy comparison participants performed a spatial and an identity priming task. Robust NP effects were found in the spatial priming task across groups and symptom patterns. However, OCD patients with a predominance of obsessive thoughts as well as schizophrenia patients with predominantly positive symptoms showed no identity NP effects, whereas OCD patients who primarily presented with compulsive rituals and schizophrenia patients with predominant negative symptoms tended to have increased identity NP compared to healthy participants. It is concluded that obsessions as well as positive psychotic symptoms are related to identity NP deficits possibly reflecting a shared basic cognitive mechanism leading to deficient thought control.

Table of Contents
Introduction
Method
Participants
Psychopathological and Cognitive Assessments
Experimental Tasks and Procedure
Spatial priming task
Identity priming task
Statistical analysis
Results
Diagnosis-Related Analyses
Patient Subgroups Analyses
Discussion
Acknowledgements
References

Correspondence to
Norbert Kathmann, PhD, Department of Psychology, Humboldt University, Rudower Chaussee 18, D-12489 Berlin, Germany.

Keywords
Negative Priming, obsessive-compulsive disorder, schizophrenia, attention, inhibition, positive symptoms, negative symptoms, obsessions, compulsions

Dates
Received 22 Aug 2012; Revised 4 Apr 2013; Accepted 15 May 2013; In Press 16 Oct 2013







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