Group

Excellence

Effective

Ineffectiveness

Always effectively

control group (n = 36)

5 (13.89)

20 (55.56)

11 (30.56)

25 (69.44)

Observation group A (n = 36)

11 (30.56)^①

19 (52.78)

6 (16.67)

30 (83.33)^①

Observation group B (n = 34)

16 (47.06)^①②

16 (47.06)

2 (5.88)

32 (94.12)^①②