Do situational or cognitive factors contribute more to risky driving? A simulated driving study

In this study, two simulated drives were conducted to examine the impact of cognitive factors, reflected as working memory capacity and response inhibition capacity, and situational factor, reflected as time pressure, on several risky driving measures. These measures included the percentage of the distance traveled while speeding, the standard deviation of the lateral lane position on curves, safety scores, and accident frequency. Fifty-one participants were recruited by means of monetary rewards. Similar to the results from previous studies, working memory capacity, response inhibition, and time pressure were found to be significantly correlated with risky driving behaviors. Further investigation showed that (1) time pressure, as a situational factor, contributed more to speeding; (2) response inhibition, as a cognitive factor, contributed more to lane-keeping precision; (3) cognitive factors (working memory capacity and response inhibition capacity) and situational factor had almost equal effects on responses to critical events. The results also indicated no significant interaction between cognitive and situational factors on risky driving behaviors. Our findings conclude that the mechanisms behind risky driving behaviors differ, and these results have possible implications for traffic safety interventions.
Source: Cognition, Technology and Work - Category: Information Technology Source Type: research