What did a study by Strayer and Johnston (2001) regarding the effects of attention on driving conclude?

Strayer and Johnston (2001) found that drivers talking on a cell phone were more likely to miss traffic signals, whether they used a handheld or hands-free phone. The key point is that the distraction comes from the conversation, not simply from holding the phone. Therefore, the correct choice is “Driving and talking on any type of cell phone increases the chance of missing traffic signals.”

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