Universität zu Köln

Pytlik, Nico, Soll, Daniel, Hesse, Klaus, Moritz, Steffen, Bechdolf, Andreas, Herrlich, Jutta, Kircher, Tilo, Klingberg, Stefan, Landsberg, Martin W., Mueller, Bernhard W., Wiedemann, Georg, Wittorf, Andreas, Woelwer, Wolfgang, Wagner, Michael and Mehl, Stephanie (2020). Problems in measuring the JTC-bias in patients with psychotic disorders with the fish task: a secondary analysis of a baseline assessment of a randomized controlled trial. BMC Psychiatry, 20 (1). LONDON: BMC. ISSN 1471-244X

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Abstract

BackgroundThe jumping to conclusions bias (JTC) is considered to be an important causal factor in theoretical models for the formation and maintenance of delusions. However, recent meta-analytic findings show a rather equivocal pattern of results regarding associations between JTC and delusions. Thus, the present study aims to investigate in a large sample whether the JTC-bias is more pronounced in patients with psychotic disorders in comparison to controls and whether the JTC bias is associated with a more severe delusional conviction, persecutory delusions, and positive symptoms in general.MethodsPatients with psychotic disorders (n=300) enrolled in a therapy trial and healthy controls (n=51) conducted a variant of the beads task (fish task) as a measure for the JTC-bias at the start of the trial. Further, clinical interviews were used to assess patients' delusional severity and delusional conviction.ResultsThere were no statistically significant differences between patients with psychotic disorders (with 53% displaying the JTC-bias) and controls (41%). Furthermore, there were no statistically significant correlations between JTC measures and persecutory delusions, delusional conviction, and positive symptoms.ConclusionsWe found no differences in JTC between patients with psychotic disorders and healthy controls, which is in part in line with meta-analytic findings using a wide range of JTC task variants. Interestingly, patients with psychotic disorders displayed JTC rates commonly found in the literature, while healthy control subjects showed an unexpectedly high level of JTC. The task variant we used in the present study (fish task) is discussed as a potential reason for our results, as it may induce a more deliberative reasoning style in controls as compared to the traditional beads task. Furthermore, possible implications for the measurement of the JTC-bias, in general, are discussed.Trial RegistrationISRCTN29242879 (isrctn.com), date of registration: April 12th 2006, retrospectively registered.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pytlik, Nico UNSPECIFIED UNSPECIFIED UNSPECIFIED Soll, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Hesse, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Moritz, Steffen UNSPECIFIED UNSPECIFIED UNSPECIFIED Bechdolf, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Herrlich, Jutta UNSPECIFIED UNSPECIFIED UNSPECIFIED Kircher, Tilo UNSPECIFIED UNSPECIFIED UNSPECIFIED Klingberg, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Landsberg, Martin W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Bernhard W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wiedemann, Georg UNSPECIFIED UNSPECIFIED UNSPECIFIED Wittorf, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Woelwer, Wolfgang UNSPECIFIED UNSPECIFIED UNSPECIFIED Wagner, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Mehl, Stephanie UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-310896
DOI:	10.1186/s12888-020-02959-5
Journal or Publication Title:	BMC Psychiatry
Volume:	20
Number:	1
Date:	2020
Publisher:	BMC
Place of Publication:	LONDON
ISSN:	1471-244X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NEGATIVE SYNDROME SCALE; DELUSIONAL IDEATION; PERSECUTORY DELUSIONS; CONCLUSIONS BIAS; SCHIZOPHRENIA; SPECIFICITY; MECHANISMS; PANSS Multiple languages Psychiatry Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31089