Texting while driving might derail your brain’s ‘autopilot’
EP4PRO, August 2nd, 2016, in ep4records
Whether it’s kids squabbling in the back seat, work stress, or your phone constantly pinging, countless things can distract you when you’re driving. But are certain distractions riskier than others?
That’s what researchers from the University of Houston and the Texas A&M Transportation Institute wanted to find out. In a new study (funded in part by the Toyota Class Action Settlement Safety Research and Education program), they observed how drivers coped when distracted by absentminded thoughts, emotions, and text messages.
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The authors noted that while many studies have explored the dangers of texting and driving, there’s less research on how other kinds of stressors can affect your behavior at the wheel. But their results indicate that the worst kind of distraction may indeed be checking your phone.
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Lead researchers Ioannis Pavlidis, PhD, and Robert Wunderlich speculate that the driver’s trajectories remained straight under cognitive and emotional stress thanks to the intervention of a part of the brain called the anterior cingulate cortex (ACC), which provides a “fight or flight” reflex. “For sure, there is corrective action precipitated from some brain center, likely the ACC, when we are distracted while performing a routine dexterous task, driving in this case,” Pavlidis says. “When this distraction is purely mental, this corrective mechanism works well.”
But to do its job, your ACC requires eye-hand coordination: “It appears that an eye-hand feedback loop is needed for the brain to be able to accomplish these corrections,” Wunderlich explains. And that feedback loop is disrupted when you look at your phone.
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“When there is a physical distraction, either all by itself or in addition to mental distraction, then this corrective mechanism breaks down,” Pavlidis explains. “The reason is that the corrective function depends on all the physical resources, eyes and hands in this case, to keep executing its ‘auto-pilot’ function.”
All of this goes to show that reading and responding to messages on the road is every bit as dangerous as you thought — and maybe more.
