International Journal of Vehicular Technology

Research Article

Identification of Cognitive Distraction Using Physiological Features for Adaptive Driving Safety Supporting System

Table 5

Identification capability for each feature set.


Set	Selected features	Cognitive load	Hamming decoding	Loss-based decoding

	Gaze	No load	70.6	42.5
		Conversation	45.6	45.0
		Arithmetic	56.4	43.0
		Average	57.5	43.5

	Head	No load	74.8	59.7
		Conversation	52.8	55.8
		Arithmetic	69.3	54.8
		Average	65.6	56.8

	Pupil	No load	88.3	84.1
		Conversation	56.0	71.7
		Arithmetic	76.1	76.8
		Average	73.5	77.6

	RRI	No load	74.7	65.7
		Conversation	42.5	48.6
		Arithmetic	69.0	64.0
		Average	62.1	59.4

	Gaze + head	No load	81.8	70.4
		Conversation	58.2	64.5
		Arithmetic	63.2	56.7
		Average	67.7	63.9

	Gaze + pupil	No load	89.0	83.5
		Conversation	59.6	74.1
		Arithmetic	75.0	76.1
		Average	74.5	77.9

	Gaze + RRI	No load	79.9	70.2
		Conversation	53.0	61.7
		Arithmetic	69.1	67.0
		Average	67.3	66.3

	Head + pupil	No load	91.8	87.1
		Conversation	66.1	81.6
		Arithmetic	75.3	78.6
		Average	77.7	82.4

	Head + RRI	No load	83.8	76.2
		Conversation	59.6	70.1
		Arithmetic	75.2	75.5
		Average	72.8	73.9

	Pupil + RRI	No load	91.2	88.3
		Conversation	63.1	83.6
		Arithmetic	80.3	83.9
		Average	78.4	85.3

	Gaze + head + pupil	No load	92.5	87.9
		Conversation	66.9	84.0
		Arithmetic	74.5	80.2
		Average	78.0	84.0

	Gaze + head + RRI	No load	86.3	80.2
		Conversation	60.4	74.8
		Arithmetic	75.0	75.5
		Average	73.7	76.9

	Gaze + pupil + RRI	No load	91.5	88.7
		Conversation	66.5	86.3
		Arithmetic	80.5	83.7
		Average	79.5	86.2

	Head + pupil + RRI	No load	92.5	89.9
		Conversation	71.1	88.1
		Arithmetic	81.2	87.4
		Average	81.6	88.5

	Gaze + head + pupil + RRI	No load	95.5	95.0
		Conversation	82.5	96.8
		Arithmetic	89.6	95.5
		Average	89.5	95.8