Author:
Broome M. R.,Johns L. C.,Valli I.,Woolley J. B.,Tabraham P.,Brett C.,Valmaggia L.,Peters E.,Garety P. A.,McGuire P. K.
Abstract
BackgroundCognitive models propose that faulty appraisal of anomalous experiences
is critical in developing psychosis, particularly delusions. A data
gathering bias may be fundamental to abnormal appraisalAimsTo examine whether there is a data gathering bias in people at high risk
of developing psychosisMethodIndividuals with an at-risk mental state (n=35) were
compared with a matched group of healthy volunteers
(n=23). Participants were tested using a modified
version of the ‘beads’ reasoning task with different levels of task
difficultyResultsWhen task demands were high, the at-risk group made judgements on the
basis of less information than the control group (P <
0.05). Within both groups, jumping to conclusions was directly correlated
with the severity of abnormal beliefs and intolerance of uncertainty
(P<0.05). In the at-risk group it was also
associated with impaired working memory (P<0.05),
whereas in the control group poor working memory was associated with a
more conservative response style (P<0.05)ConclusionsPeople with an at-risk mental state display a jumping to conclusions
reasoning style, associated with impaired working memory and intolerance
of uncertainty. This may underlie a tendency to develop abnormal beliefs
and a vulnerability to psychosis
Publisher
Royal College of Psychiatrists
Subject
Psychiatry and Mental health
Cited by
167 articles.
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