Type of variable

Variable name

Variable assignment

Mean value

Standard deviation

Willness

Are you willing to protect the lake environment

1 = Willing;0 = unwilling

0.89

0.314

Degree

Whether to prevent others from destroying the lake environment

1 = Yes; 0 = No

0.73

0.466

Personal characteristics

Gender

1 = male;2 = female

0.76

0.43

Age

1 = 19 and under; 2 = 20 - 39; 3 = 40 - 59; 4 = 60 and over

1.89

0.751

Education

1 = Junior high school and below;2 = High School; 3 = college; 4 = Master or above

3.46

0.915

Whether the work is stable

1 = stable; 2 = unstable

1.410

2.216

Residence years

1 = 10 years and less than years (including 10 years); 2 = 10 - 15 years (including 15 years) and more than 5 years; 3 = 15 years or more

3.165

1.549

System perception

Whether know the lake system

1 = very understand;2 = more understand; 3 = understand; 4 = not much understand; 5 = not understand

3.200

1.110