Development of Estimating Equation of Machine Operational Skill by Utilizing Eye Movement Measurement and Analysis of Stress and Fatigue

Table 5

Slopes of the regression lines and correlation coefficients in each relation with 𝐶-index.

	Operator
	A	B	C	D	E	F
𝐶-index/HR
Slope	−2.07	−0.49	−0.68	-0.88	−0.56	0.05
c.c.	−0.31	0.27	−0.23	0.14	−0.46	0.05
𝐶-index/𝐶vrri
Slope (×10^−3)	−2.50	0.88	−4.50	2.10	−5.50	−2.80
c.c.	−0.16	0.14	−0.34	0.14	−0.48	−0.36
𝐶-index/𝛾
Slope (×10^−6)	−1.39	−0.30	−1.88	−5.60	−2.32	6.50
c.c.	−0.14	−0.01	−0.66	−0.13	−0.33	0.48

c.c.: correlation coefficient.