• Cédric Galéra, Ludivine Orriols, Katia M'Bailara, Magali Laborey, Benjamin Contrand, Régis Ribéreau-Gayon, Françoise Masson, Sarah Bakiri, Catherine Gabaude, Alexandra Fort, Bertrand Maury, Céline Lemercier, Maurice Cours, Manuel-Pierre Bouvard, and Emmanuel Lagarde.
• ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, University of Bordeaux, F-33000 Bordeaux, France.
• BMJ. 2012 Jan 1;345:e8105.

ObjectiveTo assess the association between mind wandering (thinking unrelated to the task at hand) and the risk of being responsible for a motor vehicle crash.DesignResponsibility case-control study.SettingAdult emergency department of a university hospital in France, April 2010 to August 2011.Participants955 drivers injured in a motor vehicle crash.Main Outcome MeasuresResponsibility for the crash, mind wandering, external distraction, negative affect, alcohol use, psychotropic drug use, and sleep deprivation. Potential confounders were sociodemographic and crash characteristics.ResultsIntense mind wandering (highly disrupting/distracting content) was associated with responsibility for a traffic crash (17% (78 of 453 crashes in which the driver was thought to be responsible) v 9% (43 of 502 crashes in which the driver was not thought to be responsible); adjusted odds ratio 2.12, 95% confidence interval 1.37 to 3.28).ConclusionsMind wandering while driving, by decoupling attention from visual and auditory perceptions, can jeopardise the ability of the driver to incorporate information from the environment, thereby threatening safety on the roads.

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