How and why being happy can help you avoid car accidents!

How and why being happy can help you avoid car accidents!

Thanks to the Neurocritic (HERE

Are happy people responsible for fewer accidents? Should positive psychology be a mandatory module in high school Driver's Ed classes? Taken together, a new paper in the 2012 Christmas issue of BMJ and a recent TEDx talk tell a potentially interesting story about happiness, car crashes, and mind wandering. Let's see how this dangerous idea holds up to scrutiny.

Driving and Daydreaming

It seems rather obvious that distraction is not good for driving, regardless of whether the offending diversion is from external or internal sources. Daydreaming (now known as "mind wandering", its more formal and scientific-sounding name) is a very common state of mind while driving. We'll often travel 10 miles down the road without being aware of our surroundings at all. But does this make us more prone to accidents? Galera et al. (2012) asked this question in a study designed to determine who was responsible for a motor vehicle accident (a "responsibility case-control study"). In other words, was the driver in question responsible for the auto accident? And what were they doing at the time?

The authors interviewed 955 patients in the emergency room at Bordeaux University Hospital within 72 hours of a motor vehicle accident. They used a standardized instrument to determine if the patient was at fault (8-12 = responsible; 13-15 = contributory; >15 = not responsible). Notably, eyewitness reports were not considered. The interview protocol is described below (Galera et al., 2012):

During the interview, patients were asked to describe their thought content just before the crash. … Each thought was classified in one of the following categories: thought unrelated to the driving task or to the immediate sensory input, thought related to the driving task, no thought or no memory of any thought. To capture the intensity of the thought when the mind was wandering, the participant filled in a Likert-type scale (0-10) for each thought, answering the question: “How much did the thought disrupt/distract you?”

Scores were then categorized into three levels of mind wandering:

mind wandering with highly disrupting/distracting content (unrelated to the driving task or to the immediate sensory input)

mind wandering with little disrupting/distracting content (unrelated to the driving task or to the immediate sensory input)

none reported (no thought or no memory of any thought or thoughts related to the driving task)

Also considered were possible confounding variables such as age, sex, season, time of day, vehicle model, amount of sleep (less than 6 hrs was considered sleep deprived), and use of any psychotropic drug in the previous week (sleeping pills, anti-seizure medications, and drugs for various psychiatric disorders).  Blood alcohol level was obtained from the medical record. Sources of external distraction were assessed (e.g., use of a mobile phone, texting, grooming, eating, watching TV, etc.), as was mood or emotional valence at the time of the crash (pleasure-displeasure on a 9-point Likert scale).

The major finding was that mind wandering with highly distracting content was associated with a significantly higher likelihood of crash responsibility than if the driver reported no mind wandering. Also significantly related to responsibility were the expected factors of alcohol use and sleep deprivation, as well as the "emerging risk factors" of external distraction [which seemed expected to me], negative affect, and psychotropic medication use (see figure below – click for a larger view)…

…keep reading the full & original article HERE