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Sleep-related benefits to transitive inference are modulated by encoding strength and joint rank

Foldes, Tamas ORCID:, Santamaria, Lorena and Lewis, Penny ORCID: 2023. Sleep-related benefits to transitive inference are modulated by encoding strength and joint rank. Learning & Memory 30 (9) , pp. 201-211. 10.1101/lm.053787.123

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Transitive inference is a measure of relational learning that has been shown to improve across sleep. Here, we examine this phenomenon further by studying the impact of encoding strength and joint rank. In experiment 1, participants learned adjacent premise pairs and were then tested on inferential problems derived from those pairs. In line with prior work, we found improved transitive inference performance after retention across a night of sleep compared with wake alone. Experiment 2 extended these findings using a within-subject design and found superior transitive inference performance on a hierarchy, consolidated across 27 h including sleep compared with just 3 h of wake. In both experiments, consolidation-related improvement was enhanced when presleep learning (i.e., encoding strength) was stronger. We also explored the interaction of these effects with the joint rank effect, in which items were scored according to their rank in the hierarchy, with more dominant item pairs having the lowest scores. Interestingly, the consolidation-related benefit was greatest for more dominant inference pairs (i.e., those with low joint rank scores). Overall, our findings provide further support for the improvement of transitive inference across a consolidation period that includes sleep. We additionally show that encoding strength and joint rank strongly modulate this effect.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher: Cold Spring Harbor Laboratory Press
ISSN: 1072-0502
Date of First Compliant Deposit: 25 July 2023
Date of Acceptance: 11 July 2023
Last Modified: 25 Apr 2024 01:05

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