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Intentional inhibition but not source memory is related to hallucination-proneness and intrusive thoughts in a university sample

Alderson-Day, B.; Smailes, D.; Moffatt, J.; Mitrenga, K.; Moseley, P.; Fernyhough, C.

Intentional inhibition but not source memory is related to hallucination-proneness and intrusive thoughts in a university sample Thumbnail


Authors

D. Smailes

J. Moffatt

K. Mitrenga

P. Moseley

C. Fernyhough



Abstract

Proneness to unusual perceptual states – such as auditory or visual hallucinations – has been proposed to exist on a continuum in the general population, but whether there is a cognitive basis for such a continuum remains unclear. Intentional cognitive inhibition (the ability to wilfully control thoughts and memories) is one mechanism that has been linked to auditory hallucination susceptibility, but most evidence to date has been drawn from clinical samples only. Moreover, such a link has yet to be demonstrated over and above relations to other cognitive skills (source monitoring) and cognitive states (intrusive thoughts) that often correlate with both inhibition and hallucinations. The present study deployed two tests of intentional inhibition ability – the Inhibition of Currently Irrelevant Memories (ICIM) task and Directed Forgetting (DF) task – and one test of source monitoring (a source memory task) to examine how cognitive task performance relates to self-reported i) auditory hallucination-proneness and ii) susceptibility to intrusive thoughts in a non-clinical student sample (N = 76). Hierarchical regression analyses were used to assess the independent and combined contributions of task performance to proneness scores. ICIM performance but not DF or source memory scores were significantly related to both hallucination-proneness and intrusive thoughts. Further analysis suggested that intrusive thoughts may mediate the link between intentional inhibition skills and auditory hallucination-proneness, suggesting a potential pathway from inhibition to perception via intrusions in cognition. The implications for studying cognitive mechanisms of hallucination and their role in “continuum” views of psychosis-like experiences are discussed.

Citation

Alderson-Day, B., Smailes, D., Moffatt, J., Mitrenga, K., Moseley, P., & Fernyhough, C. (2019). Intentional inhibition but not source memory is related to hallucination-proneness and intrusive thoughts in a university sample. Cortex, 113, 267-278. https://doi.org/10.1016/j.cortex.2018.12.020

Journal Article Type Article
Acceptance Date Dec 19, 2018
Online Publication Date Jan 14, 2019
Publication Date Apr 30, 2019
Deposit Date Dec 20, 2018
Publicly Available Date Feb 8, 2019
Journal Cortex
Print ISSN 0010-9452
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 113
Pages 267-278
DOI https://doi.org/10.1016/j.cortex.2018.12.020

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