Information sources and congruency modulate preference-based decision-making processes

Ozkan, Aysegul and Zhang, Jiaxiang ORCID: https://orcid.org/0000-0002-4758-0394 2024. Information sources and congruency modulate preference-based decision-making processes. Journal of Cognitive Psychology 36 (6) , pp. 775-792. 10.1080/20445911.2024.2384666

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Abstract

Preference-based decisions often need to combine multiple pieces of information. This study investigated how the number of information sources and information congruency affect decision performance. Participants made preference-based choices between two groups of food items. Increasing the number of items in each option led to slower and less accurate decisions. Drift-diffusion modelling showed that more information sources relate to a slower rate of evidence accumulation. Therefore, the additional information impeded rather than improved the decision accuracy. In Experiment 2, each choice option contained either fully congruent information or one piece of incongruent information. Decisions with incongruent information is associated with a lower drift rate than that with congruent information, leading to inferior behaviorual performance. Further model simulations support that the change in attention weighting over information sources leads to the observed effects of item numbers and item congruency. Our results suggest a bounded combination of information sources during preference-based decisions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher:	Taylor and Francis Group
ISSN:	2044-5911
Date of First Compliant Deposit:	28 August 2024
Date of Acceptance:	15 July 2024
Last Modified:	02 Sep 2024 09:30
URI:	https://orca.cardiff.ac.uk/id/eprint/171618

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