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Table 4 Correlations between POMS and physiological values in each condition

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

  POMS pre-task Tension-anxiety Depression-dejection Anger-hostility Vigor Fatigue Confusion
Pre-task HF 0.17 0.10 -0.04 -0.10 0.19 -0.02
LF/HF 0.16 0.13 0.18 -0.02 0.06 -0.02
Finger pulse rate 0.11 0.05 0.09 -0.13 -0.27 0.01
Pulse amplitude -0.17 -0.14 -0.15 0.03 0.10 -0.01
Lyapunov exponent 0.01 -0.26 -0.15 -0.06 -0.15 0.08
  POMS post-task Tension- anxiety Depression- dejection Anger-hostility Vigor Fatigue Confusion
CWT-1 HF -0.13 -0.27 0.10 -0.27 -0.02 -0.09
LF/HF -0.14 -0.03 -0.06 0.22 -0.17 -0.07
Finger pulse rate -0.71 0.21 -0.22 -0.06 0.01 -0.05
Pulse amplitude -0.09 -0.21 0.09 -0.21 -0.17 0.06
Lyapunov exponent -0.47** -0.25 -0.05 0.15 -0.31 -0.28
CWT-2 HF -0.24 0.03 -0.03 -0.24 0.14 -0.13
LF/HF -0.29 -0.29 -0.05 0.06 -0.46** -0.14
Finger pulse rate -0.05 0.20 -0.09 -0.15 -0.01 -0.07
Pulse amplitude -0.08 -0.26 0.20 -0.22 -0.17 0.11
Lyapunov exponent -0.34 -0.13 0.02 0.05 -0.21 -0.28
CWT-3 HF -0.29 0.12 0.07 -0.35 -0.07 -0.06
LF/HF -0.36* -0.32 -0.05 0.10 -0.33 -0.32
Finger pulse rate -0.03 0.04 -0.14 -0.15 -0.06 -0.02
Pulse amplitude 0.01 -0.14 0.16 -0.23 -0.13 0.22
Lyapunov exponent -0.31 -0.11 0.07 -0.09 -0.25 -0.20
Post-task HF -0.12 0.06 -0.01 0.09 0.04 -0.09
LF/HF -0.09 -0.21 0.26 -0.23 -0.33 -0.06
Finger pulse rate 0.08 0.14 -0.02 -0.13 -0.07 -0.05
Pulse amplitude -0.21 -0.06 -0.08 0.04 -0.17 -0.01
Lyapunov exponent -0.18 -0.14 0.09 -0.04 -0.02 -0.12
  1. Values are given as Spearman’s rank correlation coefficient rho (n = 31). Values in bold had >0.30 correlation with POMS. *P < 0.05; **P < 0.01 (Spearman’s rank correlation). CWT, Stroop color-word conflict test; HF, high-frequency component; LF, low-frequency component; post-task, rest period after CWT; pre-task, rest period before CWT.