Subjective and physiological indicators of fatigue in a vigilance task.
subjectivephysio00inne.pdf (2.683Mb)
Innes, Henry Edgar.
This research represents an investigation to determine intra - correlations among physiological parameters, a subjective rating of fatigue and performance during a vigilance task. Simple and multivariate analyses indicate positive relationships between subjective ratings of fatigue and heart rate, neck muscle tension level and two measures of sinus arryhthmia. Subjective ratings were found to correlate with time-on-task. Effects of motivation on sinus arryhthmia are discussed in the context of information processing. Single variate correlations between performance and heart rate, as well as with subjective ratings of fatigue, were observed with significant but low correlation coefficients. Multivariate correlation of neck muscle tension level and sinus arryhthmia were found to be significantly correlated with performance .