Cited by 200Sleep and related disordersCircadian rhythm and melatoninSleep and Work-Related Fatigue

Social jetlag negatively correlates with academic performance in undergraduates

Haraszti, Réka Ágnes, Ella, Krisztina, Gyöngyösi, Norbert, Roenneberg, Till, Káldi, Krisztina·2014·Chronobiology International

Abstract

Discrepancies between sleep timing on workdays and weekends, also known as social jetlag (SJL), affect the majority of the population and have been found to be associated with increased health risk and health-impairing behaviors. In this study, we explored the relationship between SJL and academic performance in a sample of undergraduates of the Semmelweis University. We assessed SJL and other sleep-related parameters with the Munich ChronoType Questionnaire (MCTQ) (n = 753). Academic performance was measured by the average grade based on weekly test results as well as scores acquired on the final test (n = 247). The average mid-sleep point on free days in the Hungarian sample fits well the regression line plotted for longitudes within the Central European Time Zone and chronotypes, confirming that sunlight has a major impact on chronotype. Multivariate analysis showed negative effect of SJL on the weekly average grade (p = 0.028, n = 247) during the lecture term with its highly regular teaching schedules, while this association disappeared in the exam period (p = 0.871, n = 247) when students had no scheduled obligations (lower SJL). We also analyzed the relationship between the time of the weekly tests and academic performance and found that students with later sleep times on free days achieved worse in the morning (p = 0.017, n = 129), while the inverse tendency was observed for the afternoon test-takers (p = 0.10, n = 118). We did not find significant association between academic performance and sleep duration or sleep debt on work days. Our data suggest that circadian misalignment can have a significant negative effect on academic performance. One possible reason for this misalignment is socially enforced sleep times.

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Crossref · 10.3109/07420528.2013.879164

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Authors
Haraszti, R. Á., Ella, K., Gyöngyösi, N., Roenneberg, T., & Káldi, K.
Affiliations
  • Semmelweis University (HU)
  • Institut für Medizinische Psychologie (DE)
Corresponding author
Káldi, Krisztina
Venue
Chronobiology International
Published
2014-02-03
Volume
31
Issue
5
Pages
603-612
ISSN
  • 0742-0528 (ISSN-L)
  • 1525-6073
OpenAlex
W2156263298
Cited by
200
References
66
Citations by year
2026: 7 · 2025: 18 · 2024: 10 · 2023: 24 · 2022: 19 · 2021: 23 · 2020: 17 · 2019: 27 · 2018: 8 · 2017: 15 · 2016: 15 · 2015: 11 · 2014: 6
FWCI
21.62
Type
journal article
Language
en
Open access
closed
Locations
  • Chronobiology International (publishedVersion)
  • PubMed (publishedVersion)
  • Semmelweis University Repository (Semmelweis University) (submittedVersion)
Funders
  • Semmelweis Egyetem
  • Faculty of Medicine and Dentistry, University of Alberta
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
social jetlag, academic performance, chronotype, circadian misalignment, sleep timing, Munich Chronotype Questionnaire, university students, test performance, sleep debt, sleep duration
MeSH terms
Adolescent, Adult, Circadian Rhythm, Curriculum, Educational Measurement, Educational Status, Female, Germany, Humans, Male, Surveys and Questionnaires, Sleep, Social Behavior, Students, Teaching, Time Factors, Universities, Work Schedule Tolerance, Chronobiology Disorders, Young Adult

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