Table 1.

Rules-based filter for invalid physiological data.

Rules	Filter for invalid data	Range
1	To prevent “floor” artifacts (eg, electrode loses contact with skin) and “ceiling” artifacts (circuit is overloaded)—EDAa not in a valid range	0.05 to 60 µSb
2	EDA changes too quickly—EDA slope not in a valid range	−10 to +10 µS/second
3	Skin temperature suggests the EDA sensor is not being worn—skin temperature not in a valid range	30 to 40 °C
4c	HRd not in a valid range	25 to 250 bpme
5	Transitional data surrounding segments identified as invalid via the preceding rules—account for transition effects	Within 5 seconds

^aEDA: electrodermal activity.

^bµS: microsiemens.

^cAddition to the algorithm used by Kleckner et al [52].

^dHR: heart rate.

^ebpm: beats per minute.