3.4 million real-world learning management system logins reveal the majority of students experience social jet lag correlated with decreased performance

  title={3.4 million real-world learning management system logins reveal the majority of students experience social jet lag correlated with decreased performance},
  author={Benjamin L. Smarr and Aaron E. Schirmer},
  journal={Scientific Reports},
Misalignments between endogenous circadian rhythms and the built environment (i.e., social jet lag, SJL) result in learning and attention deficits. Currently, there is no way to assess the impact of SJL on learning outcomes of large populations as a response to schedule choices, let alone to assess which individuals are most negatively impacted by these choices. We analyzed two years of learning management system login events for 14,894 Northeastern Illinois University (NEIU) students to… 
Social Jet-Lag in Tertiary Students Following a Modern Curriculum with Few Time-Tabled Contact Hours: A Pilot Study
Within this pilot study of students engaged in a problem-based learning curriculum, Owls have no selective disadvantage compared to Larks concerning sleep, and the difference between the midpoint of sleep on weekdays and weekend days was comparable for Larks and Owls.
Large-scale digital traces of university students show that morning classes are bad for attendance, sleep, and academic performance
Big datasets collected passively from university students show that morning classes are associated with lower attendance, shorter nocturnal sleep, and lower grade point average in university students, and universities should avoid scheduling early morning classes.
University-wide chronotyping shows late-type students have lower grades, shorter sleep, poorer well-being, lower self-regulation, and more absenteeism
The findings suggest that multiple factors converge to impair learning in late-type students and interventions that focus on improving students’ well-being and learning strategies may be important for addressing the late- type academic disadvantage.
Validation and psychometric properties of the Spanish Mood Rhythm Instrument
ABSTRACT Mood-related behavioral display a daily rhythmic pattern. However, most clinical instruments do not assess mood rhythm aspects. The Mood Rhythm Instrument (MRhI) intends to contribute to
Lower variability in female students than male students at multiple timescales supports the use of sex as a biological variable in human studies
The findings support including sex as a biological variable and do not support variance-based arguments for the exclusion of women as research subjects, although women are more behaviorally variable than men and may support the opposite.
Comparison of sleep and chronotype between senior and undergraduate university students
Evaluating for the first time the chronotype, the sleep quality and their relationship in senior university students and to compare them with those of undergraduate students showed that undergraduate students tended toward eveningness while senior students tended towards morningness.
Sleep and circadian indices for planning post-pandemic university timetables
In a multivariate model, sleep quality, chronotype and study subject were independent predictors of academic performance and underlie the importance of designing circadian-friendly university timetables.
Measuring Adolescents' Well-being: Correspondence of Naive Digital Traces to Survey Data
Analysis of correlations between self-reports and digital trace proxies of depression, anxiety, mood, social integration and sleep among high school students shows that digital traces can serve as useful supplements to, rather than substitutes for, survey data in studies on adolescents' well-being.
Women in gig economy work less in the evenings
Women have been systematically disadvantaged in the labour market. This could be explained by a complex association of factors, such as the lower speed of women’s professional growth within


Digital Sleep Logs Reveal Potential Impacts of Modern Temporal Structure on Class Performance in Different Chronotypes
  • B. Smarr
  • Psychology
    Journal of biological rhythms
  • 2015
It is found that sleep duration variance and mean sleep-onset times both significantly correlate with class performance, supporting the hypothesis that modern schedule impositions on sleep and circadian timing have consequences for real-world learning and memory.
How jet lag impairs Major League Baseball performance
The effects of jet lag, that is, travel that shifts the alignment of 24-h environmental cycles relative to the endogenous circadian clock, are examined on specific performance metrics in Major League Baseball to reveal surprisingly specific effects of circadian misalignment on athletic performance under natural conditions.
Lower school performance in late chronotypes: underlying factors and mechanisms
Findings concerning exam times: students with a late chronotype are at a disadvantage in exams on scientific subjects, and when they are examined early in the day are expanded.
Timing of Examinations Affects School Performance Differently in Early and Late Chronotypes
The results support delaying high school starting times as well as scheduling examinations in the early afternoon to avoid discrimination of late chronotypes and to give all high school students equal academic opportunities.
Chronotype, class times, and academic achievement of university students
It is confirmed that morning chronotypes attain better grades than evening chronotypes, although the association is weak (r2 = 0.02), and the difference persisted even after the time of day of classes and exams was taken into consideration.
Social Jetlag: Misalignment of Biological and Social Time
Humans show large differences in the preferred timing of their sleep and activity. This so‐called “chronotype” is largely regulated by the circadian clock. Both genetic variations in clock genes and
Social jetlag, academic achievement and cognitive performance: Understanding gender/sex differences
Results separated by sex/gender indicated that SJL may be more detrimental to girls’ performance, as it was negatively related to a greater number of cognitive abilities and GPA.
Jet lag syndrome: circadian organization, pathophysiology, and management strategies
The aim of this review is to provide mechanistic links between the fields of sleep and circadian rhythms to understand the biological basis of jet lag and to apply this information to clinical management strategies.
School Start Times for Adolescents
The American Academy of Pediatrics strongly supports the efforts of school districts to optimize sleep in students and urges high schools and middle schools to aim for start times that allow students the opportunity to achieve optimal levels of sleep.
Deterioration of neurobehavioral performance in resident physicians during repeated exposure to extended duration work shifts.
Chronic sleep deficiency caused progressive degradation in residents' neurobehavioral performance and exacerbated the effects of acute sleep loss inherent in the 24- to 30-h EDWS that are commonly used in resident schedules.