Table 2 Results of item analysis(31items)

Q1

8.980*

0.552*

0.892

Retained

Q2

11.009*

0.588*

0.891

Retained

Q3

11.765*

0.576*

0.892

Retained

Q4

11.911*

0.608*

0.891

Retained

Q5

8.675*

0.609*

0.891

Retained

Q6

9.041*

0.573*

0.892

Retained

Q7

9.215*

0.469*

0.894

Retained

Q8

9.183*

0.560*

0.892

Retained

Q9

8.047*

0.556*

0.892

Retained

Q10

8.589*

0.542*

0.892

Retained

Q11

9.781*

0.572*

0.892

Retained

Q12

7.510*

0.420*

0.895

Retained

Q13

9.155*

0.566*

0.892

Retained

Q14

5.818*

0.537*

0.893

Retained

Q15

6.936*

0.490*

0.893

Retained

Q16

7.728*

0.527*

0.893

Retained

Q17

9.013*

0.532*

0.893

Retained

Q18

8.653*

0.543*

0.893

Retained

Q19

7.887*

0.447*

0.894

Retained

Q20

6.498*

0.425*

0.895

Retained

Q21

6.400*

0.430*

0.894

Retained

Q22

5.547*

0.423*

0.895

Retained

Q23

7.280*

0.435*

0.894

Retained

Q24

6.448*

0.431*

0.895

Retained

Q25

7.161*

0.446*

0.894

Retained

Q26

6.642*

0.431*

0.895

Retained

Q27

7.086*

0.410*

0.895

Retained

Q28

7.503*

0.407*

0.895

Retained

Q29

8.407*

0.434*

0.894

Retained

Q30

7.310*

0.402*

0.895

Retained

Q31

8.215*

0.408*

0.895

Retained