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14 December 2012

Wandering minds cause road crashes

People whose minds wander while driving are significantly more likely to be responsible for a crash and are threatening safety on the roads, warns a study.

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People whose minds wander whilst driving, especially when intense, are significantly more likely to be responsible for a crash and are threatening safety on the roads, warns a study.

The term "mind wandering" has been coined to describe thinking unrelated to the task at hand. It happens most often at rest or during repetitive tasks.

All drivers experience occasional drifting of their minds towards internal thoughts, a temporary "zoning out" that might dangerously distract them from the road.

External distractions (such as from mobile phones) are known to be linked with crashes, but inattention arising from internal distractions (such as worries) is still poorly understood in the context of road safety.

How the research was done

A team of researchers from France therefore wanted to see if mind wandering would increase the risk of being responsible for a crash.

They interviewed 955 drivers injured in a motor vehicle crash attending the emergency department at Bordeaux University Hospital between April 2010 and August 2011. All participants were 18 years or older.

Patients were asked to describe their thought content just before the crash. Researchers also assessed how disruptive/distracting the thought was. Mitigating factors considered to reduce driver responsibility, such as road environment, traffic conditions, traffic rule obedience and difficulty of the driving task were also taken into account.

Finally, blood alcohol level was tested as well as the driver's emotional state just before the crash.

They classified 453 (47%) drivers as responsible for the crash and 502 (53%) as not responsible.

Over half (52%) reported some mind wandering just before the crash, and its content was highly disrupting / distracting (defined as intense mind wandering) in 121 (13%).

17% of crashes blamed on wandering minds

Intense mind wandering was associated with greater responsibility for a crash - 17% (78 of 453 crashes in which the driver was thought to be responsible) compared with 9% (43 of 502 crashes in which the driver was not thought to be responsible).

This association remained after adjusting for other confounding factors that could have affected the results.

The authors conclude that the association between intense mind wandering and crashing "could stem from a risky decoupling of attention from online perception, making the driver prone to overlook hazards and to make more errors during driving."

They add that this study could lead to new interventions to help drivers by detecting periods of inattention. "Detecting those lapses can therefore provide an opportunity to further decrease the toll of road injury."

(EurekAlert, December 2012)

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