Table 3 Means and standard deviations of outcomes in each group and results of ANCOVAs

Primary outcomes

 LSAS total score

Pre-test

n = 27

67.22

23.01

n = 23

70.70

23.54

.29

.66

Post-test

n = 27

61.11

20.04

n = 23

66.04

25.92

Follow-up

n = 27

61.56

18.60

n = 23

69.09

27.89

 LSAS anxiety

Pre-test

n = 27

39.33

12.95

n = 23

39.43

11.63

.18

.43

Post-test

n = 27

36.22

12.06

n = 23

37.39

13.72

Follow-up

n = 27

36.00

10.88

n = 23

38.30

14.47

 LSAS avoidance behavior

Pre-test

n = 27

27.89

11.02

n = 23

31.26

12.79

.46

.80

Post-test

n = 27

24.89

9.06

n = 23

28.65

13.27

Follow-up

n = 27

25.56

9.24

n = 23

30.78

14.36

 SCPS cost bias total score

Pre-test

n = 27

34.22

9.05

n = 23

33.43

7.29

.34

1.96

Post-test

n = 27

31.81

7.83

n = 23

32.48

7.99

Follow-up

n = 27

29.44

7.64

n = 23

32.39

8.34

 SCPS cost bias

Negative cognition from one’s performance

Pre-test

n = 27

22.96

7.81

n = 23

22.57

5.47

.02

1.57

Post-test

n = 27

22.30

6.15

n = 23

21.87

6.47

Follow-up

n = 27

20.26

5.97

n = 23

22.09

6.91

 SCPS cost bias

Negative cognition generated when paying attention to others

Pre-test

n = 27

11.26

2.01

n = 23

10.87

2.49

3.64

2.69

Post-test

n = 27

9.52

2.53

n = 23

10.61

2.15

Follow-up

n = 27

9.19

2.34

n = 23

10.30

2.38

 SCPS probability bias total score

Pre-test

n = 27

31.00

8.47

n = 23

31.26

8.22

8.90^**

3.93^*

Post-test

n = 27

24.52

6.69

n = 23

29.52

7.38

Follow-up

n = 27

25.89

8.45

n = 23

25.89

8.45

 SCPS probability bias

Negative cognition from one’s performance

Pre-test

n = 27

20.59

6.76

n = 23

21.04

6.48

3.60

1.84

Post-test

n = 27

17.15

5.14

n = 23

19.91

6.15

Follow-up

n = 27

17.81

6.31

n = 23

18.70

5.97

 SCPS probability bias

Negative cognition generated when paying attention to others

Pre-test

n = 27

10.41

2.19

n = 23

10.22

2.70

19.04^**

7.86^**

Post-test

n = 27

7.37

1.92

n = 23

9.61

2.43

Follow-up

n = 27

8.07

2.64

n = 23

9.26

2.07

Secondary outcomes

 SFA total score

Pre-test

n = 27

27.26

8.34

n = 23

25.09

7.69

.12

.38

Post-test

n = 27

24.78

7.58

n = 23

23.96

7.48

Follow-up

n = 27

22.04

8.01

n = 23

22.52

7.90

 SFA arousal

Pre-test

n = 27

13.48

5.60

n = 23

11.22

4.75

.13

.22

Post-test

n = 27

12.26

4.06

n = 23

10.39

5.98

Follow-up

n = 27

10.89

5.48

n = 23

9.91

5.89

 SFA behavior

Pre-test

n = 27

13.78

4.20

n = 23

13.87

4.04

1.56

1.26

Post-test

n = 27

12.52

4.23

n = 23

13.57

3.23

Follow-up

n = 27

11.15

4.35

n = 23

12.61

3.65

 SFNE total score

Pre-test

n = 27

44.22

8.46

n = 23

44.96

7.26

6.46^*

8.91^**

Post-test

n = 27

38.74

8.47

n = 23

44.39

9.14

Follow-up

n = 27

37.00

7.36

n = 23

44.17

6.77

 SFNE forward-item

Pre-test

n = 27

28.04

6.60

n = 23

29.13

5.50

6.38^*

8.22^**

Post-test

n = 27

24.78

6.20

n = 23

29.00

5.98

Follow-up

n = 27

23.00

5.99

n = 23

28.39

5.16

 SFNE reversed-item

Pre-test

n = 27

16.19

2.50

n = 23

15.83

2.90

4.78^*

5.40^**

Post-test

n = 27

13.96

2.82

n = 23

15.39

3.54

Follow-up

n = 27

14.00

2.24

n = 23

15.78

2.43

Additional outcomes

 FFMQ

Pre-test

n = 27

111.22

9.92

n = 23

112.30

13.29

33.27^**

22.29^**

Post-test

n = 27

124.11

13.30

n = 23

108.74

10.09

Follow-up

n = 27

126.70

16.09

n = 23

110.04

9.91

 FFMQ

Pre-test

n = 26

112.00

9.24

n = 23

112.30

13.29

39.54^**

24.16^**

 SDS

Pre-test

n = 27

45.07

6.25

n = 23

43.13

8.70

13.31^**

10.54^**

Post-test

n = 27

39.59

7.38

n = 23

44.30

9.00

Follow-up

n = 27

38.67

8.22

n = 23

43.26

8.46

 SHS

Pre-test

n = 27

17.48

3.90

n = 23

17.13

3.99

17.56^**

13.15^**

Post-test

n = 27

20.78

3.71

n = 23

17.09

3.44

Follow-up

n = 27

20.00

3.51

n = 23

17.13

3.55