Towards a reliable repeated-measures beads task for assessing the jumping to conclusions bias
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Date
2018-04-12
Authors
McLean, Benjamin F
Mattiske, Julie Kay
Balzan, Ryan P
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Rights
© 2017 Elsevier BV.
Rights Holder
Elsevier BV.
Abstract
The jumping to conclusions bias (JTC), in which some people gather less information than
others before making a decision, has been linked to delusions in psychosis. JTC is usually
identified via the beads task, in which a sequence of beads (the “target” sequence) is used to
measure the amount of evidence participants require before making a decision. Yet, despite
its common use, the reliability of the task has never been properly investigated. We
investigated its reliability, and tested an alternate version which used distractor sequences to
obfuscate the target sequence. Healthy participants (N = 212) were randomised into two
groups. One group completed ten trials using the target sequence, while the other completed
ten trials of the target sequence and three distractor sequences. Our data indicated the
standard task may not be reliable over repeated measures, but that by including distractor
sequences, the task becomes more believable, repeatable, and reliable. Additionally,
excluding first-trial data (a “silent” practice trial) also improves repeatability. These
improvements to the task are relevant to single trial studies, and will be especially useful to
repeated-measures longitudinal, experimental, and treatment studies. Such repeated-measures
studies are important for investigating the causal link between JTC and delusions.
Description
© 2017 Elsevier BV. This manuscript version is made available under the CC-BY-NC-ND 4.0 license:
http://creativecommons.org/licenses/by-nc-nd/4.0/
This author accepted manuscript is made available following 12 month embargo from date of publication (April 2018) in accordance with the publisher’s archiving policy
Keywords
beads task, jumping to conclusions, repeated measures, repeatability, reliability
Citation
McLean, B. F., Mattiske, J. K., & Balzan, R. P. (2018). Towards a reliable repeated-measures beads task for assessing the jumping to conclusions bias. Psychiatry Research, 265, 200–207. https://doi.org/10.1016/ j.psychres.2018.04.043