Table 4 The results of automated item selection procedure

0–0.4

1: 20

1–20

0.45

1: 19

1–11, 12–20

12

0.5–0.55

2:16, 2

3–11, 13–17, 19–20

12, 18

1, 2

0.6

2:14, 2

3, 5, 6–11, 13, 15–17, 19–20

12, 18

1, 2, 4, 14

0.65

4: 9, 2, 2, 2

8–11, 13, 15–17, 19

12, 18

3, 4

6, 7

1, 2, 5, 20

0.7

3: 7, 3, 2

8–9, 13, 15–17, 19

3, 10, 11

12, 18

1, 2, 4–7, 14, 20

0.75

4: 4, 2, 2, 2

8–9, 17, 19

3, 10

15, 16

12, 18

1, 2, 4-7, 11, 13-14, 20

0.8

2: 2, 2

9, 17

8, 19

1–7, 10–16, 18, 20

0.85

1: 2

9, 17

1–8, 10–16, 18–20