What do Drivers Fail to See When Conversing on a Cell Phone?

Abstract

Our research examined the effects of hands-free cell phone conversations on simulated driving. We found that even when participants looked directly at objects in the driving environment, they were less likely to create a durable memory of those objects if they were conversing on a cell phone. Moreover, this pattern was obtained for objects of both high- and low-relevance, suggesting that very little semantic analysis of the objects occurs outside the restricted focus of attention. These data support the inattention-blindness interpretation in which the disruptive effects of cell phone conversations on driving are due in large part to the diversion of attention from driving to the phone conversation. We suggest that even when participants are directing their gaze at objects in the driving environment that they may fail to “see” them when they are on the phone because attention is directed elsewhere.

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