Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Observer Rated Sleepiness and Real Road Driving: An Explorative Study
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0002-4790-7094
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.ORCID iD: 0000-0002-2061-5817
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.
Stress Research Institute, Stockholm.
Show others and affiliations
2013 (English)In: PLOS ONE, E-ISSN 1932-6203, Vol. 8, no 5, p. e64782-Article in journal (Refereed) Published
Abstract [en]

The aim of the present study was to explore if observer rated sleepiness (ORS) is a feasible method for quantification of driver sleepiness in field studies. Two measures of ORS were used:

  1. one for behavioural signs based on facial expression, body gestures and body movements labelled B-ORS, and
  2. one based on driving performance e.g. if swerving and other indicators of impaired driving occurs, labelled D-ORS

A limited number of observers sitting in the back of an experimental vehicle on a motorway about 2 hours repeatedly 3 times per day (before lunch, after lunch, at night) observed 24 participant's sleepiness level with help of the two observer scales. At the same time the participant reported subjective sleepiness (KSS), EOG was recorded (for calculation of blink duration) and several driving measure were taken and synchronized with the reporting.

Based on mixed model Anova and correlation analysis the result showed that observer ratings of sleepiness based on drivers' impaired performance and behavioural signs are sensitive to extend the general pattern of time awake, circadian phase and time of driving. The detailed analysis of the subjective sleepiness and ORS showed weak correspondence on an individual level. Only 16% of the changes in KSS were predicted by the observer. The correlation between the observer ratings based on performance (D-ORS) and behavioural signs (B-ORS) are high (r =. 588), and the B-ORS shows a moderately strong association (r =. 360) with blink duration. Both ORS measures show an association (r>0.45) with KSS, whereas the association with driving performance is weak.

The results show that the ORS-method detects the expected general variations in sleepy driving in field studies, however, sudden changes in driver sleepiness on a detailed level as 5 minutes is usually not detected; this holds true both when taking into account driving behaviour or driver behavioural signs.

Place, publisher, year, edition, pages
2013. Vol. 8, no 5, p. e64782-
Keywords [en]
Fatigue (human), Measurement, Observation, Method, Driver, In situ
National Category
Applied Psychology
Research subject
80 Road: Traffic safety and accidents, 841 Road: Road user behaviour
Identifiers
URN: urn:nbn:se:vti:diva-7169DOI: 10.1371/journal.pone.0064782ISI: 000319733000095PubMedID: 23724094Scopus ID: 2-s2.0-84878411304OAI: oai:DiVA.org:vti-7169DiVA, id: diva2:750541
Available from: 2014-09-29 Created: 2014-09-29 Last updated: 2021-06-14Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMedScopus

Authority records

Anund, AnnaFors, Carina

Search in DiVA

By author/editor
Anund, AnnaFors, Carina
By organisation
Human-vehicle-transport system interaction
In the same journal
PLOS ONE
Applied Psychology

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 877 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf