Driving Under the Influence of Phones: The Importance of Cognitive Ability and Cognitive Style on Interruption-Related Performance

Abstract

The impact of notifications on driving performance is a critical safety concern (Lee & Strayer, 2004). This study examined how interruptions (including phone calls) impair simulated driving performance, and how individual differences mediate the effect of those interruptions. Consistent with our hypothesis, field dependent participants answered phone calls more quickly and with less consideration of the difficulty of the current driving situation than more field independent participants. Further, a post-hoc analysis showed that, on average, field dependents with small operating spans crashed twice as often as the other drivers. Thus the detrimental effect of a field dependent style on managing interruptions while driving is likely worsened for people with low working memory capacity. It is suggested that future research should investigate the safety implications of individual differences in interruption handling ability. Such research is needed to support ongoing efforts to develop guidelines and legislation concerning the use of distracting information technologies (such as cell phones) in automobiles.

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