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Data Gathering Bias: Trait Vulnerability to Psychotic Symptoms?
Ana Catalan1, Claudia J P Simons2, Sonia Bustamante1
1Department of Neuroscience, University of the Basque Country, Basque Country, Spain; Department of Psychiatry, Basurto University Hospital, Bilbao, Spain.
Plos One
|July 7, 2015
Summary
Jumping to conclusions (JTC) is more common in individuals with psychosis and borderline personality disorder (BPD), suggesting it may indicate a trait vulnerability for developing psychotic disorders.
Area of Science:
- Cognitive psychology
- Psychiatry
- Neuroscience
Background:
- Jumping to conclusions (JTC) is linked to psychotic disorders and symptoms.
- Investigating JTC as a trait requires examining its prevalence in psychosis-prone individuals and its temporal stability.
Purpose of the Study:
- To assess the rate of JTC reasoning bias in patients with first episode psychosis (FEP), borderline personality disorder (BPD), and healthy controls.
- To determine if JTC is a stable trait over time in FEP patients.
Main Methods:
- The Beads Task was used to measure JTC bias in FEP patients, BPD patients, and controls.
- Psychotic symptoms were assessed using PANSS, SIS-R, and CAPE scales.
- Intellectual quotient (IQ) was evaluated using WAIS III subtests.
Main Results:
- 44% of FEP patients exhibited JTC bias compared to 19% of BPD patients and 9% of controls.
- JTC bias was not correlated with the severity of psychotic symptoms or delusionality.
- JTC bias in FEP patients remained stable over a one-year follow-up period.
Conclusions:
- JTC reasoning bias appears to be a trait reflecting vulnerability to psychotic disorders.
- Findings support the role of JTC as a potential endophenotype for psychosis.
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