The psychophysiological determinants of fatigue

Nirupama Wijesuriya, Yvonne Tran, Ashley Craig*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Driver fatigue is a major risk for road accidents that can often result in injury and death. However, considerable debate still exists concerning factors associated with driver fatigue. Because of the complex nature of fatigue, this paper reports a study that investigated both physiological and psychological determinants of fatigue. Three fatigue outcome measures were used, including a physiological, psychological and a combined physiological and psychological measure. Fifty participants performed a driving simulator task till they showed symptoms of fatigue and were assessed before and after the task. Significant factors associated with physiological fatigue included higher levels of baseline delta activity and an extraverted personality. Factors related to the psychological fatigue outcome measure included sleepiness, low healthy lifestyle status, an extraverted personality and tension-prone personality, and negative mood states. The combined fatigue outcome measure was associated with factors such as a tension-prone and extraverted personality, low systolic blood pressure, and negative mood states. The findings emphasize the importance of assessing fatigue using a range of outcome measures in order to achieve a thorough understanding of what factors contribute to fatigue and highlight the need to develop fatigue countermeasures that employ a broad range of measures.

Original languageEnglish
Pages (from-to)77-86
Number of pages10
JournalInternational Journal of Psychophysiology
Issue number1
Publication statusPublished - Jan 2007
Externally publishedYes


  • Drowsiness
  • Fatigue
  • Physiological determinants
  • Psychological determinants
  • Road safety
  • Sleepiness

Fingerprint Dive into the research topics of 'The psychophysiological determinants of fatigue'. Together they form a unique fingerprint.

Cite this