Table 3.

Selected film slice example

Signal	Feature	Symbol
EEG	Percentage PSD	${\text{𝐸𝐷}}_k$
	Standard deviation	Estd
	Average power	Epow
	Mean of the absolute value	Emean
	Blink frequency	Fb
ECG	Heart rate	HR
	Heart rate stability	HRstd
	Power	Hpow
RESP	Respiratory rate	RR
	Respiratory stability	RRstd
	Absolute mean of second order difference	${\text{𝑅𝑚𝑒𝑎𝑛}}_{\text{𝑑𝑖𝑓𝑓𝑖𝑖}}$
	Percentage PSD	${\text{𝑅𝐷}}_k$
	Standard deviation of second order difference	${\text{𝑅𝑠𝑡𝑑}}_{\text{𝑑𝑖𝑓𝑓𝑖𝑖}}$
Head posture	Posture stability	Pstd