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Table 2 Mean values of largest Lyapunov exponent and finger pulse wave amplitude

From: Evaluation of mental stress by physiological indices derived from finger plethysmography

 

Lyapunov exponent (AU)

Finger pulse wave amplitude (AU)

Pre-task

3.34 ± 0.75

210 ± 109

CWT-1

3.83 ± 1.36

93 ± 89

CWT-2

3.63 ± 1.31

103 ± 91

CWT-3

3.66 ± 1.36

109 ± 89

Post-task

3.61 ± 1.05

174 ± 87

  1. Values are given as mean ± standard deviation (n = 31). AU, arbitrary unit; CWT, Stroop color-word conflict test; post-task, rest period after CWT; pre-task, rest period before CWT. Significant differences (P < 0.001) were seen in all stages of finger pulse wave amplitude. (Wilcoxon signed-ranks test).