Our research examined the effects of practice on in-vehicle cell-phone use. Drivers that reported either high or low real world cell-phone usage were selected to participate in four, hour-and-a-half simulated driving sessions, on different days. The research consisted of two phases, a training phase and a novel transfer phase. Compared to single-task driving, dual-task performance deficits persisted through training and transfer driving conditions. Furthermore, groups of high and low real world experience were equally impaired. It is concluded that practice does not improve the ability to drive while conversing on a cellphone.
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