The effect of reducing the 'jumping to conclusions' bias on treatment decision-making capacity in psychosis: A randomised controlled trial with mediation analysis

Turner, David T; MacBeth, Angus; Larkin, Amanda; Moritz, Steffen; Livingstone, Karen; Campbell, Alison; Hutton, Paul

doi:10.1093/schbul/sby136

The effect of reducing the 'jumping to conclusions' bias on treatment decision-making capacity in psychosis: A randomised controlled trial with mediation analysis

Turner, David T; MacBeth, Angus; Larkin, Amanda; Moritz, Steffen; Livingstone, Karen; Campbell, Alison; Hutton, Paul

Authors

David T Turner

Angus MacBeth

Amanda Larkin

Steffen Moritz

Karen Livingstone

Alison Campbell

Prof Paul Hutton P.Hutton@napier.ac.uk
Professor

Abstract

Background
Evidence-based psychological interventions to support treatment decision-making capacity (‘capacity’) in psychosis do not currently exist. This study sought to establish whether reducing the extent to which this group form conclusions based on limited evidence, also
known as the ‘jumping to conclusions’ (JTC) bias, could improve capacity.
Methods
In a randomised-controlled open trial, 37 patients aged 16-65 years diagnosed with schizophrenia-spectrum disorders were randomly assigned (1:1) to receive a single-session intervention designed to reduce the JTC bias (MCT-JTC; adapted from Metacognitive
Training) or an attention control (AC) condition designed to control for therapist attention, duration, modality and face validity. Primary outcomes were treatment decision-making capacity measured by the MacArthur Competency Assessment Tool for Treatment (MacCATT)
and the jumping-to-conclusions reasoning bias measured by draws to decision on the Beads task, each of which were administered by the psychologist delivering the intervention.
Results
Those receiving MCT-JTC had large improvements in overall capacity (d=0.96, p

Journal Article Type	Article
Acceptance Date	Sep 3, 2018
Online Publication Date	Sep 26, 2018
Publication Date	2019-07
Deposit Date	Sep 3, 2018
Publicly Available Date	Sep 26, 2018
Journal	Schizophrenia Bulletin
Print ISSN	0586-7614
Electronic ISSN	1745-1701
Publisher	Oxford University Press
Peer Reviewed	Peer Reviewed
Volume	45
Issue	4
Pages	784-793
DOI	https://doi.org/10.1093/schbul/sby136
Keywords	capacity, psychosis, RCT, jumping-to-conclusions, meta-cognitive therapy
Public URL	http://researchrepository.napier.ac.uk/Output/1290620
Contract Date	Sep 3, 2018

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Copyright Statement
This is a pre-copyedited, author-produced version of an article accepted for publication in Schizophrenia Bulletin following peer review. The version of recordTurner, D., MacBeth, A., Larkin, A., Moritz, S., Livingstone, K., Campbell, A., & Hutton, P. (in press). The effect of reducing the 'jumping to conclusions' bias on treatment decision-making capacity in psychosis: A randomised controlled trial with mediation analysis. Schizophrenia Bulletin, ISSN 0586-7614 is available online at: xxxxxxx [insert URL and DOI of the article on the OUP website]