Table 1 List of features used in this study with their definitions and references of their extraction.

From: Assessing Autonomic Function from Electrodermal Activity and Heart Rate Variability During Cold-Pressor Test and Emotional Challenge

FeatureDefinitionReference
F1
μRR[ms]First-moment statistic of the Inverse Gaussian distribution in point process framework (Mean of RR series)67
\({\sigma }_{RR}^{2}\)[ms2]Second-moment statistic of the Inverse Gaussian distribution in point process framework (Variance of RR series)67
RMSSDRoot Mean Square of the Successive Differences (RMSSD)50
PNN50Normalized mean number of times an hour in which the change in successive normal sinus (NN) intervals exceeds 50 ms50
LFpp[ms2]Integration of linear power spectrum estimate of RR series in the low frequency band (0.04–0.15 Hz)67
HFpp[ms2]Integration of linear power spectrum estimate of RR series in the high frequency band (0.14–0.45 Hz)67
LFpp/HFppRatio of LF and HF spectral powers67
F2
LLpp[ms2]Double integration of the bispectrum of RR series in low and low frequency bands20
LHpp[ms2]Double integration of the bispectrum of RR series in low and high frequency bands20
HHpp[ms2]Double integration of the bispectrum of RR series in high and high frequency bands20
F3
EDASympIntegration of time-frequency plane of EDA signal within the 0.045–0.25 Hz band7
SHFRatio between EDASymp and HFThis paper
F4
EDA.nSCRThe number of significant (above threshold) phasic driver peaks54
EDA.SumAmpSCRThe sum of SCR amplitudes with respect to significant peaks54
EDA.PhasicMaxThe maximum value of phasic activity54
EDA.TonicMean tonic activity computation54
F5
SLLRatio between EDASymp and LLThis paper
SLHRatio between EDASymp and LHThis paper
SHHRatio between EDASymp and HHThis paper
\({{\boldsymbol{F}}}_{{{\bf{6}}}_{{\bf{1}}}}\)
LLphMedian value of phasic decomposition of LLThis paper
LHphMedian value of phasic decomposition of LHThis paper
HHphMedian value of phasic decomposition of HHThis paper
\({{S}_{LL}}_{ph}\)Median value of phasic decomposition of the ratio between EDASymp and LLThis paper
\({{S}_{LH}}_{ph}\)Median value of phasic decomposition of the ratio between EDASymp and LHThis paper
\({{S}_{HH}}_{ph}\)Median value of phasic decomposition of the ratio between EDASymp and HHThis paper
\({{\boldsymbol{F}}}_{{6}_{2}}\)
LLph(AUC)Area under the curve of phasic decomposition of LLThis paper
LHph(AUC)Area under the curve of phasic decomposition of LHThis paper
HHph(AUC)Area under the curve of phasic decomposition of HHThis paper
\({{S}_{LL}}_{ph}(AUC)\)Area under the curve of phasic decomposition of the ratio between EDASymp and LLThis paper
\({{S}_{LH}}_{ph}(AUC)\)Area under the curve of phasic decomposition of the ratio between EDASymp and LHThis paper
\({{S}_{HH}}_{ph}(AUC)\)Area under the curve of phasic decomposition of the ratio between EDASymp and HHThis paper