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Table 3 Mean values of autonomic nervous system indices derived from APG

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

  HF (ms2) LF/HF
Pre-task 5.97 ± 0.70 1.03 ± 0.15
CWT-1 5.25 ± 0.91 1.06 ± 0.20
CWT-2 5.11 ± 0.82 1.12 ± 0.20
CWT-3 4.95 ± 0.98 1.12 ± 0.30
Post-task 5.88 ± 0.59 1.07 ± 0.13
  1. Values are given as mean ± standard deviation (n = 31). APG, acceleration plethysmography; 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. Significant differences were seen in all stages of HF (P < 0.001) and between Pre-task and Post-task of LF/HF (P < 0.05). (Wilcoxon signed-ranks test).