For the multitasking portion of the experiment, researchers asked the volunteers to complete a verbal version of the memory test on a hands-free cell phone while driving in a simulator.
在实验的多任务部分，研究者要求志愿者在进行模拟驾驶的同时完成一项口头的非手持电话记忆测试。
LaHood has said it is never safe to talk on a cell phone while driving, hands-free or not, because it is a "cognitive distraction."
拉胡德表示，不论开不开免提，开车时使用手机从来没有安全一说，因为这种做法会造成“注意力分散”。
LaHood has said it is never safe to talk on a cell phone while driving, hands-free or not, because it is a "cognitive distraction."
拉胡德表示，不论开不开免提，开车时使用手机从来没有安全一说，因为这种做法会造成“注意力分散”。
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