Abstract
Chronotype refers to individual differences in the timing of circadian sleep-wake cycles and subjective alertness throughout the day. It is a potential factor influencing people's driving behaviour, but no research has explored the mechanisms underlying this topic. The current study aimed to explore the relationship between morningness-eveningness preferences and driving behaviour and the mediating effect of visual search between them. Thirty-eight drivers were selected to participate in this study based on their chronotype. They were divided into morning-type and evening-type groups by their score on the reduced Morningness-Eveningness Questionnaire (rMEQ). Both groups completed a visual search task and a simulated driving task in a morning session and an evening session. The results showed that morningness-eveningness preferences had synchronous effects on basic driving performance; specifically, morning-type drivers showed better driving behaviour in the morning than in the evening, and evening-type drivers showed the opposite trend. Furthermore, visual search abilities showed a mediating effect between morningness-eveningness preference and driving performance. The mechanisms underlying these results are discussed. Related results and data could aid with schedule arrangements for professional drivers.
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