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Hands-free and driving don’t mix

Experts say use of hands-free to take or make a call while driving causes ‘attentional blindness’

Image Credit: Voisin/Phanie / Rex Features
Attention deficit: Using hands-free while driving can cause ‘attentional blindness’ say experts

DUBAI The use of hands-free sets could lead to “attentional blindness” among drivers and many accidents, said a leading UAE psychologist.

Dr Taha Amir, UAE University professor of psychology, said there is a “mistaken belief” that the use of hands-free mobile phones while driving reduces road mishaps compared to using handheld mobile phones.

In the latest issue of The UAE Psychologist, a bi-annual newsletter, he cited research which shows that conversing with a hands-free mobile phone is a cause of “significant distraction” and is much more distracting than conversing with a fellow passenger.

Attentional blindness is defined as a result of a process that consumes significantly more “attentional resources” than deciphering natural sounds received in a face-to-face conversation.

“Some people think that since using hands-free does not engage sight, one can focus on the road while using it. But this is not true. Our research shows that the cause of distraction is the process of deciphering degraded sound conveyed over the mobile phone.”

Dr Amir said their experimental study was run in the psychology lab of the UAE University in Al Ain and involved 244 male and female subjects (aged 19 to 60). Their conclusion: Using hands-free mobile while driving results in “attention trade-off”, with potentially disastrous consequences.

“This study shows that attention is a limited capacity reservoir,” Dr Amir said. “When two tasks, like driving and conversing over the phone, compete for attentional resources, they ‘trade-off’. If one takes more, the other takes less,” he explained.

Dr Amir told XPRESS that even a hands-free conversation while driving must be totally avoided “because engaging in a conversation on a mobile phone while operating a vehicle is very risky. It is good that there is a law against this practice. But the media should raise public awareness.”

Dr Amir was the study’s principal investigator, and co-authored by Mohammad Abdel Hafez, of UAEU’s Department of Electrical Engineering, and Kamal Sharaf Ali, of the Computer Engineering Department of the University of Southern Mississippi. The research was funded by UAE University Research Section.

The study’s results were also presented at the annual convention of the International Council of Psychologists in Brazil and published by the council’s UK journal.

Dr Amir said that sounds carried over wireless telephones are severely degraded as they go though many stages of manipulation before being transmitted.

“Sound [transmitted over phone networks] is sampled. These samples are converted to a digital stream of ones and zeros. This stream of bits is then modulated to be squeezed into a very narrow frequency slice to be transmitted.”

He said that the degradation of the sounds conveyed through phones is obvious when somebody tries to spell a word over the phone. For example, if somebody wanted to spell the word “tide” over the phone, the person would say tango for the letter ‘T’, India for the letter ‘I’, delta for the letter ‘D’, and echo for the letter ‘E’.

“Obviously the person does not need to do this if he is talking with the other person face to face,” he said.

In 2011 a UAE University survey of 576 young drivers revealed two-thirds of them had been involved in one or more accidents. More than one in four said they suffered injuries in car accidents.

That study, also spearheaded by Dr Amir with colleague Dr Shamma Al Falasy, cited peer pressure as the reason for the alarming number of UAE car accidents, injuries and fatalities among young drivers.


Making sense of driving

  • Driving requires both sensation and perception. Sensation is registering a signal (image, sound, chemical, etc) in specialised neurons or nerve cells in a sense organ (the eye, ear, nose, etc). Registering a light signal in the neurons of the eye is not enough for “seeing” as the signal needs to be perceived — organised and interpreted — to be meaningful and useable.”
  • For perception to take place, attentional resources are needed. This, however, will not be available if this person is not only engaged in a phone conversation but is also deciphering degraded sounds. Since this process consumes a lot of a person’s attentional resources, it leaves very little 
for the road ahead.

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Very true, But if the conversation is not that serious enough one can train the mind to focus on driving without diverting complete attention and talk. However safty of others also should be taken into consideration than ending up in trouble.

Sam Eapen

24 January 2013 16:39jump to comments