Why You'll Crash Your Car if You Talk on Your Cell Phone
June 28 2008
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A study has shed new light on why talking on a cell phone makes drivers prone to accidents. The study examined how having a conversation with someone who is not present competes with those parts of the brain needed to perform visual tasks.
Volunteers were asked to take part in a series of visual tests on a computer while listening to an informational lecture. They were then asked questions about what they had heard.
When they were just listening, they were able to tune out what they were hearing and focus on the visual tasks. But if they were also asked to speak, their performance on the tasks plummeted.
The study found differences, although smaller ones, based on where the sound was coming from. It may be that when people talk to someone who is not present, the visual-processing parts of their brain create a mental representation of where the other person might be.