|
Paper Title:
Driver Fatigue: Psychological
and Electroencephalography assessment
View
full paper
Authors:
Saroj Lal, Ashley Craig
Abstract:
Task performance during
driving may be influenced by psychological factors since individuals
differ in temperament and anxiety status. Fatigue has been associated
with changes in brain wave activity e.g. delta and theta. However,
research on psychophysiological associations with driver fatigue
is scarce. Understanding the psychological links could provide information
on better fatigue management.
The aim was to identify
the psychological associations during driver fatigue and the corresponding
electroencephalography (EEG) changes. Thirty-five drivers were randomly
assigned to the study. Subjects performed a driver simulator task
until physical signs of fatigue was observed. Simultaneous nineteen
channel EEG measures were obtained. Psychological factors assessed
with validated questionnaires were anxiety, mood states and locus
of control and fatigue state.
The subjects were slightly
fatigued before the study and moderately to extremely fatigued after
the study. Delta activity was associated with increased anxiety
(r=0.42, p=0.01), Vigor-Activity (r=-0.44, p=0.009), Fatigue Inertia
(r=0.39, Theta activity was associated with Trait Anxiety and control
efficacy (r=0.35, p=0.04) and fatigue state (r=0.44, p=0.009). Alpha
and beta were associated with Fatigue-Inertia (r=0.36, p=0.03 and
r=0.43, p=0.009, respectively). Beta activity was also associated
with fatigue state (r=0.49, p=0.003).
Therefore, psychological
factors can influence fatigue status. In this study it was found
that increased anxiety, and negative mood states such as Tension-Anxiety
and Fatigue-Inertia were associated with EEG indicators of fatigue
such as increased delta and theta activity. This is the first study
to show that various psychological factors may influence driver
fatigue. To date no other study has investigated psychological and
physiological changes simultaneously during driver fatigue. A future
study with greater numbers and both professional and non-professional
drivers will be required to confirm the current findings.
View
full paper
Back
to Program
|
