Motivation to continue driving while sleepy: the effects on sleepiness and performance levels

Presentation

Watling, Christopher N.. 2016. "Motivation to continue driving while sleepy: the effects on sleepiness and performance levels." 6th International Conference on Traffic and Transport Psychology (ICTTP2016). Brisbane, Australia 02 - 05 Aug 2016 Australia.
Paper/Presentation Title

Motivation to continue driving while sleepy: the effects on sleepiness and performance levels

Presentation TypePresentation
Authors
AuthorWatling, Christopher N.
Year2016
Place of PublicationAustralia
Web Address (URL) of Paperhttps://www.itf-oecd.org/icttp2016-6th-international-conference-traffic-and-transport-psychology
Conference/Event6th International Conference on Traffic and Transport Psychology (ICTTP2016)
Event Details
6th International Conference on Traffic and Transport Psychology (ICTTP2016)
Event Date
02 to end of 05 Aug 2016
Event Location
Brisbane, Australia
Abstract

Driver sleepiness contributes to a substantial proportion of fatal and severe road crashes and potentially contributes to a greater proportion of less serious crashes. A number of survey studies have reported that some drivers choose to continue to drive while sleepy despite being aware of an increasing level of sleepiness. Additionally, drivers’ motivations to continue driving while sleepy is a stronger predictor of sleepy driving behaviours, overshadowing crash risk perception of sleepy driving. While several survey studies have quantified self-reported aspects of continuing to drive while sleepy, there appears to be lack of studies that examine the actual psychophysiological and performance sequela of continuing to drive when sleepy. The current study sought to examine the effect motivating oneself to apply extra effort to the task of driving when sleepy on physiological and subjective sleepiness and driving performance. In total, 18 participants undertook a 60 minute Hazard Perception test on four occasions – on the four occasions, the participants motivation level (motivated and non-motivated) and sleepiness level (sleepy-alert) were experimentally manipulated. Physiological, subjective, and performance indices of sleepiness were obtained with respect to the effects of the manipulation of motivation and sleepiness levels. The results suggest that no effect of motivation was observed in the Hazard Perception test data. Physiological and subjective sleepiness were both greater in the sleepy conditions than the alert conditions and over the duration of both tests, sleepiness levels increased regardless of the motivation or sleepiness conditions. Considered together, these findings suggest that sleepiness is very resilient to motivations to stay alert and improve performance levels. The present results suggest that continuing to drive while sleepy whereby the drivers motivate themself to apply extra effort to the task of driving is a dangerous driving behaviour.

Keywordsdriving performance, hazard perception, motivation, physiological sleepiness, psychomotor vigilance, sleepiness, subjective sleepiness
ANZSRC Field of Research 2020420604. Injury prevention
520206. Psychophysiology
520404. Memory and attention
Byline AffiliationsQueensland University of Technology
Institution of OriginUniversity of Southern Queensland
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