Aggression and sleep: a daylight saving time natural experiment on the effect of mild sleep loss and gain on assaults
The purpose of this study was to test the effect of a mild, short-term sleep loss/gain on assault rates.
Using National Incidence Based Reporting System data and city-reported data from Chicago, New York, Philadelphia, and Los Angeles, we calculated the difference in assault rates on the Monday immediately following daylight saving time (DST) as compared to the Monday a week later using a Poisson quasi-maximum likelihood estimator model. The same analyses were performed to examine effects of the return to standard time in the fall. We employed several falsification checks.
There were 2.9% fewer (95% CI: –4.2%, −1.6%, p < 0.0001) assaults immediately following DST, when we lose an hour, as compared to a week later. In contrast, there was a 2.8% rise in assaults immediately following the return to standard time, when an hour is gained, as compared to a week later (95% CI: 1.5%, 4.2%, p < 0.0001). Multiple falsification analyses suggest the spring findings to be robust, while the evidence to support the fall findings is weaker.
This study suggests that mild and short-term changes in sleep do significantly affect rates of assault. Specifically, there is support for the theory that mild sleepiness possibly associated with an hour loss of sleep results in reduced assaults. This contradicts the simple inverse relationship currently suggested by most of the correlational literature. This study and the mixed findings presented by experimental studies indicate that measurement variability of both sleep and aggression may result in conflicting findings.
KeywordsAggression Antisocial behavior Crime Daylight saving time Sleep
- Backman, H., Laajasalo, T., Saukkonen, S., Salmi, V., Kivivuori, J., & Aronen, E. T. (2015). Are qualitative and quantitative sleep problems associated with delinquency when controlling for psychopathic features and parental supervision?. Journal of sleep research, 24(5), 543–548.Google Scholar
- Calandrillo, S. P., & Buehler, D. E. (2008). Time well spent: An economic analysis of daylight saving time legislation. Wake Forest L. Rev, 43, 45.Google Scholar
- Cohen, L. E., & Felson, M. (1979). Social change and crime rate trends: A routine activity approach. American Sociological Review, 588–608.Google Scholar
- Fallone, G., Acebo, C., Seifer, R., & Carskadon, M. A. (2005). Experimental restriction of sleep opportunity in children: effects on teacher ratings. Sleep, 28(12), 1561-1567.Google Scholar
- Gottfredson, M. R., & Hirschi, T. (1990). A general theory of crime. Stanford: Stanford University Press.Google Scholar
- Hagger, M. S., Wood, C., Stiff, C., & Chatzisarantis, N. L. (2010). Ego depletion and the strength model of self-control: a meta-analysis. Psychological bulletin, 136(4), 495.Google Scholar
- Krizan, Z., & Herlache, A. D. (2016). Sleep disruption and aggression: Implications for violence and its prevention. Psychology of Violence, 6(4), 542–552.Google Scholar
- Raine, A., & Venables, P. H. (2017). Adolescent daytime sleepiness as a risk factor for adult crime. Journal of Child Psychology and Psychiatry, 58(6), 728–735.Google Scholar
- Touchette, É., Petit, D., Séguin, J. R., Boivin, M., Tremblay, R. E., & Montplaisir, J. Y. (2007). Associations between sleep duration patterns and behavioral/cognitive functioning at school entry. Sleep, 30(9), 1213-1219.Google Scholar
- Van Cauter, E., Spiegel, K., Tasali, E., & Leproult, R. (2008). Metabolic consequences of sleep and sleep loss. Sleep medicine, 9, S23–S28.Google Scholar
- Varughese, J., & Allen, R. P. (2001). Fatal accidents following changes in daylight savings time: the American experience. Sleep medicine, 2(1), 31–36.Google Scholar
- Victor, D. (2016). Daylight saving time: Why does it exist? (it’s not for farming). The New York: Times.Google Scholar
- Vohs, K. D., Glass, B. D., Maddox, W. T., & Markman, A. B. (2011). Ego depletion is not just fatigue: evidence from a total sleep deprivation experiment. Social Psychological and Personality Science, 2(2), 166-173.Google Scholar
- Wagner, D. T., Barnes, C. M., Lim, V. K., & Ferris, D. L. (2012). Lost sleep and cyberloafing: Evidence from the laboratory and a daylight saving time quasi-experiment. Journal of Applied Psychology, 97(5), 1068-1076.Google Scholar
- Wooldridge, Jeffrey M. (2010). Econometric Analysis of Cross Section and Panel Data. MIT Press.Google Scholar