TY  - JOUR
PY  - 1992//
TI  - Behavioral and physiological indices of fatigue in a visual tracking task
JO  - Journal of safety research
A1  - Heath, RA
A1  - Mascord, D. J.
SP  - 19
EP  - 25
VL  - 23
IS  - 1
N2  - Heart-rate variability, heart-rate inter-beat-interval (IBI) and reaction-time were significant indicators of the effects of fatigue (or boredom) during a lengthy visual tracking task. Seventeen subjects participated in the visual tracking task, which lasted 140 minutes. Heart-rate significantly decreased across the session, while heart-rate variability increased. A significant increase in the average log value of the power contribution for the frequency band 0.08-0.12 Hz of the cardiac frequency signal was found in the final half of the session. Although performance on the primary tracking task did not deteriorate over time, there was a significant increase in mean reaction time on a secondary task that simulated an emergency situation. It was concluded that it may be possible to detect the onset of fatigue before any significant deterioration in operator performance occurs.<p />
LA  - en
SN  - 0022-4375
UR  - http://dx.doi.org/
ID  - ref1
ER  -