Table 4 Means and standard deviations of outcomes in each group and results of aNCOVAs

Primary outcomes

 LSAS total score

Pre-test

n = 26

67.23

23.46

n = 23

70.70

23.54

.33

.64

Post-test

n = 26

60.88

20.40

n = 23

66.04

25.92

Follow-up

n = 26

61.35

18.94

n = 22

69.59

28.44

 LSAS anxiety

Pre-test

n = 26

39.35

13.20

n = 23

39.43

11.63

.21

.39

Post-test

n = 26

36.12

12.28

n = 23

37.39

13.72

Follow-up

n = 26

35.88

11.08

n = 22

38.50

14.78

 LSAS avoidance behavior

Pre-test

n = 26

27.88

11.24

n = 23

31.26

12.79

.51

.82

Post-test

n = 26

24.77

9.22

n = 23

28.65

13.27

Follow-up

n = 26

25.46

9.41

n = 22

31.09

14.62

 SCPS cost bias total score

Pre-test

n = 26

33.88

9.06

n = 23

33.43

7.29

.50

1.88

Post-test

n = 26

31.38

7.65

n = 23

32.48

7.99

Follow-up

n = 26

28.92

7.29

n = 22

32.14

8.44

 SCPS cost bias

Negative cognition from one’s performance

Pre-test

n = 26

22.65

7.80

n = 23

22.57

5.47

.00

1.52

Post-test

n = 26

21.96

6.02

n = 23

21.87

6.47

Follow-up

n = 26

19.85

5.68

n = 22

21.91

7.02

 SCPS cost bias

Negative cognition generated when paying attention to others

Pre-test

n = 26

11.23

2.05

n = 23

10.87

2.49

4.09^*

2.57

Post-test

n = 26

9.42

2.53

n = 23

10.61

2.15

Follow-up

n = 26

9.08

2.31

n = 22

10.23

2.41

 SCPS probability bias total score

Pre-test

n = 26

30.65

8.44

n = 23

31.26

8.22

11.11^**

4.27^*

Post-test

n = 26

23.92

6.05

n = 23

29.52

7.38

Follow-up

n = 26

25.35

8.12

n = 22

27.73

7.65

 SCPS probability bias

Negative cognition from one’s performance

Pre-test

n = 26

20.27

6.68

n = 23

21.04

6.48

4.71^*

2.09

Post-test

n = 26

16.69

4.65

n = 23

19.91

6.15

Follow-up

n = 26

17.38

6.20

n = 22

18.55

6.06

 SCPS probability bias

Negative cognition generated when paying attention to others

Pre-test

n = 26

10.38

2.23

n = 23

10.22

2.70

21.95^**

7.94^**

Post-test

n = 26

7.23

1.82

n = 23

9.61

2.43

Follow-up

n = 26

7.96

2.63

n = 22

9.18

2.08

Secondary outcomes

 SFA total score

Pre-test

n = 26

27.12

8.47

n = 23

25.09

7.69

.19

.35

Post-test

n = 26

24.54

7.62

n = 23

23.96

7.48

Follow-up

n = 26

21.69

7.96

n = 22

22.23

7.95

 SFA arousal

Pre-test

n = 26

13.50

5.71

n = 23

11.22

4.75

.10

.23

Post-test

n = 26

12.23

4.14

n = 23

10.39

5.98

Follow-up

n = 26

10.81

5.57

n = 22

9.68

5.92

 SFA behavior

Pre-test

n = 26

13.62

4.20

n = 23

13.87

4.04

1.90

1.30

Post-test

n = 26

12.31

4.16

n = 23

13.57

3.23

Follow-up

n = 26

10.88

4.21

n = 22

12.55

3.73

 SFNE total score

Pre-test

n = 26

43.85

8.39

n = 23

44.96

7.26

7.39^**

9.57^**

Post-test

n = 26

38.15

8.05

n = 23

44.39

9.14

Follow-up

n = 26

36.35

6.66

n = 22

44.23

6.92

 SFNE forward-item

Pre-test

n = 26

27.69

6.47

n = 23

29.13

5.50

7.58^**

8.77^**

Post-test

n = 26

24.31

5.82

n = 23

29.00

5.98

Follow-up

n = 26

22.46

5.40

n = 22

28.41

5.28

 SFNE reversed-item

Pre-test

n = 26

16.15

2.54

n = 23

15.83

2.90

5.24^*

5.81^**

Post-test

n = 26

13.85

2.81

n = 23

15.39

3.54

Follow-up

n = 26

13.88

2.20

n = 22

15.82

2.48

Additional outcomes

 FFMQ

Pre-test

n = 26

112.00

9.24

n = 23

112.30

13.29

39.54^**

24.16^**

Post-test

n = 26

125.38

11.76

n = 23

108.74

10.09

Follow-up

n = 26

128.08

14.71

n = 22

110.18

10.12

 FFMQ

Pre-test

n = 26

112.00

9.24

n = 23

112.30

13.29

39.54^**

24.16^**

 SDS

Pre-test

n = 26

44.65

5.97

n = 23

43.13

8.70

14.61^**

11.92^**

Post-test

n = 26

38.96

6.74

n = 23

44.30

9.00

Follow-up

n = 26

38.00

7.60

n = 22

43.73

8.35

 SHS

Pre-test

n = 26

17.61

3.91

n = 23

17.13

3.99

20.11^**

14.34^**

Post-test

n = 26

21.04

3.53

n = 23

17.09

3.44

Follow-up

n = 26

20.23

3.36

n = 22

17.05

3.61