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0635 Vigilance Observations - Learning from Nighttime Driving Behaviours

Sleep (New York, N.Y.), 2018-04, Vol.41 (suppl_1), p.A236-A236 [Peer Reviewed Journal]

Sleep Research Society 2018. Published by Oxford University Press [on behalf of the Sleep Research Society]. All rights reserved. For permissions, please email: journals.permissions@oup.com 2018 ;Copyright © 2018 Sleep Research Society ;ISSN: 0161-8105 ;EISSN: 1550-9109 ;DOI: 10.1093/sleep/zsy061.634

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  • Title:
    0635 Vigilance Observations - Learning from Nighttime Driving Behaviours
  • Author: Tse, E ; Bao, S ; Campbell, M ; Carson, N ; Hussaina, H ; Maher, K S ; Beyzaei, N ; Kemethofer, M ; Seidenberger, M ; Spruyt, K ; Lewis, S ; Ipsiroglu, O ; Klosch, G
  • Subjects: Pictographs ; Ratings & rankings
  • Is Part Of: Sleep (New York, N.Y.), 2018-04, Vol.41 (suppl_1), p.A236-A236
  • Description: Abstract Introduction Changes in vigilance are characteristic features of sleepless or sleep-deprived individuals. To standardize vigilance assessments, we reviewed videos of nighttime drivers with a structured rating system and investigated ratings of student observers. Methods Nighttime driving videos of 60 adult volunteers recorded between 2 and 4 AM were provided by the Institute for Sleep-Wake-Research (ISWF, Vienna) and the Austrian Automobile Club (OEAMTC). Two 4.5-minute video recordings of 14 participants, after 30 and 90 minutes of driving, were analyzed. (A) Six observers rated participants using the Karolinska Sleepiness Scale (KSS); ratings were compared with drivers’ self-ratings. (B) Open-ended and pictogram-based behaviours were annotated (O-a; P-a) and separated into (i) task-oriented (i.e. driving); (ii) non-task oriented (i.e. non-driving); and (iii) posture-oriented (e.g. stretching) behaviours. (C) Timing of (earlier versus later) videos were predicted. (D) Four videos were reviewed with a Delphi consensus process, determining to what extent pictograms could support analyses. Results (A) KSS participant and observer ratings for the earlier (means, 3.0 vs. 4.25) and later recordings (mean, 6.5 vs. 6.1) were comparable, but not significant. (B) O-a and P-a revealed changes between the three behaviour categories as night progressed: task-oriented behaviours decreased; non-task oriented behaviours increased; and posture-oriented behaviours did not change. (C) However, observers failed to predict the timing of the two videos. (D) Discussions identified missing characteristic pictograms (e.g. self-stimulation) to inform future design. Conclusion Although the KSS ratings corresponded and a change in task versus non-task oriented behaviours was detected, observers failed to correctly predict the timing of the videos. Causes of this discrepancy were explored and now self-stimulating behaviours and fluency of movements are being investigated. Support (If Any) BC Children’s Hospital Research Institute and Foundation.
  • Publisher: US: Oxford University Press
  • Language: English
  • Identifier: ISSN: 0161-8105
    EISSN: 1550-9109
    DOI: 10.1093/sleep/zsy061.634
  • Source: ProQuest One Psychology
    Alma/SFX Local Collection
    ProQuest Central
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