知识百科：为什么开车时打电话很危险
还在一边打电话一边开车吗?快把电话挂了吧。不是怕警察开罚单，只是这种行为真的很危险。有多危险?看看下面这个研究就知道了。Why is driving while talking on a cellphone so dangerous? American
researchers have shown that language interferes with visual tasks and why
speaking is more taxing on the brain than listening.
"It's really an attention problem, not really about holding the phone in
your hand," said Dr. Amit Almor, an associate professor of psychology at the
University of South Carolina.
Almor and his colleague Tim Boiteau, who measured attention levels in 94
people, found that talking or preparing to speak was four times more distracting
than listening.
"People can tune in or out as needed when listening," said Almor.
In the studies the participants were asked to perform visual tasks such as
tracking a fast-moving target across a computer screen with a mouse, while
listening to pre-recorded narratives and then responding. The voice would also
shift around the room, either front, back or side to side.
The research, published in the journal "Experimental Psychology," showed
visual tasks were completed more easily when voices came from the front, though
the effect was not as dramatic as the difference between listening and
speaking.
"When the voice came from the front the interference was minimized," said
Almor, suggesting that people find it easier to have everything that requires
our attention occupying the same space.
The experiment was repeated using 20 pairs of friends involved in live
conversations and even stronger results are expected when they are compiled this
summer, Almor said.
"I suspect that the greater the urge to speak, the greater the distraction
from the visual task."
Almor also explained that when applied to the visual task of driving, the
results show that simply using hand-free devices are not very helpful.
"This isn't getting through to many legislators," he said, adding that with
driving talking on the phone is also different from talking to someone in the
car.
"When you have someone sitting next to you they are acting as an extra set
of eyes, something that a remote person can't alert you to."
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