To try to understand more about why this was, they tried two further tests. In one, members of a group were asked simply to repeat words spoken by the caller. In the other, they had to think of a word that began with the last letter of the word they had just heard. Those only repeating words performed the same as those with no distraction, but those with the more complicated task showed even worse reaction times-an average of 480 milliseconds extra delay. This shows that when people have to consider the information they hear carefully, it can impair their driving ability significantly.
Punishing people for using hand-held gadgets while driving is difficult enough, even though they can be seen from outside the car. Persuading people to switch their phones off altogether when they get behind the wheel might be the only answer. Who knows, they might even come to enjoy not having to take calls.
注意:此部分试题请在答题卡2上作答。
47. Carrying on a mobile phone conversation while one is driving is considered dangerous because it seriously distracts _____________.
48. In the experiments, the two groups of volunteers were asked to handle a series of moving tasks which were considered _____________.
49. Results of the experiments show that those who were making the equivalent of a hands-free call took ___________ to react than those who were not.
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