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Latent inhibition, learned irrelevance, and schizotypy: Assessing their relationship

Schmidt-Hansen, Mia, Killcross, Andrew Simon and Honey, Robert Colin ORCID: 2009. Latent inhibition, learned irrelevance, and schizotypy: Assessing their relationship. Cognitive Neuropsychiatry 14 (1) , pp. 11-29. 10.1080/13546800802664539

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Introduction. Previous research suggests that latent inhibition is reduced in patients with acute schizophrenia and in healthy participants with high levels of schizotypic characteristics. Other evidence indicates the disruption of a related effect (learned irrelevance) in patients with acute schizophrenia. Method. This study used a recently developed latent inhibition procedure, that avoids methodological limitations of previous studies, and a related learned irrelevance procedure to assess the relationship between these phenomena and schizotypic characteristics in undergraduate participants. Results. Participants preexposed to a letter (S) learnt the predictive relationship between that letter and another letter (X) slower than the relationship between a novel letter and X (a latent inhibition effect). Experiment 1 found reduced latent inhibition in the high schizotypy group after 10, but not 20 preexposures. In Experiment 2, participants preexposed to both S and X learnt a subsequent relationship between them slower than the relationship between a novel letter and X (a learned irrelevance effect). This effect was abolished in participants with high levels of schizotypy. Conclusions. These results are both the first demonstration of abolished learned irrelevance and of a significant reduction in latent inhibition without employing an explicit masking task in participants with high levels of positive schizotypy.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: Latent inhibition, Learned irrelevance, Schizophrenia, Schizotypy
Publisher: Taylor & Francis
ISSN: 1354-6805
Last Modified: 20 Oct 2022 09:05

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