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Individual differences in working memory efficiency modulate proactive interference after sleep deprivation

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Abstract

Whether and how sleep loss affects executive functioning are still under debate. In this study, we examined the role of individual differences in determining the levels of working memory (WM) efficiency and proactive interference (PI) after sleep deprivation. Fifty-two participants performed a test battery included a modified Sternberg task and the Jonides’ 2-back task under two sleep conditions: baseline (BL, a night of regular sleep), and total sleep deprivation (SD, 24 h of wakefulness). In general, we replicated Tucker and colleagues’ (2010) results. However, when we divided the subjects into two groups according to WM efficiency after SD, participants that showed a greater efficiency were more susceptible to PI, while those with lower WM efficiency showed a level of resistance to PI similar to BL. These results indicate that resistance to PI after SD is dependent on WM efficiency, highlighting the importance of individual differences in sleep deprivation studies.

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Abbreviations

BL:

Baseline

SD:

Sleep deprivation

M:

Mean

std:

Standard deviation

SSS:

Stanford Sleepiness Scale

GVAS:

Global Vigor–Affect Scale

VAS:

Visual Analog Scale

NT:

Non-target

T:

Target

ANOVA:

Analysis of variance

Mdn:

Median

RT:

Reaction times

PE:

Preserved-efficiency group

WE:

Worsened-efficiency group

WM:

Working memory

PI:

Proactive interference

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Acknowledgements

We gratefully thank Alessia Sassano, Virginia Veruma, Daniela Zarbo and Nicolò Zorzetto for their contribution in data collection. We are indebted to the two anonymous reviewers for providing insightful comments on earlier versions of this manuscript.

Funding

This work was supported by a grant from the Swiss National Science Foundation (grant number 320030_182589).

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Correspondence to Laura Riontino.

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The authors declare that they have no conflict of interest.

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Riontino, L., Cavallero, C. Individual differences in working memory efficiency modulate proactive interference after sleep deprivation. Psychological Research 85, 480–490 (2021). https://doi.org/10.1007/s00426-020-01292-6

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  • DOI: https://doi.org/10.1007/s00426-020-01292-6

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