Number

Mean scores

Standard Deviation

On the overall sample

Age group 1

32

57.87

11.35

Age group 2

21

55.57

10.06

Age group 3

22

50

15.87

Age group 4

25

46.44

9.62

On the experimental sample

Age group 1

16

62.32

9.32

Age group 2

10

55

11.31

Age group 3

12

56.7

11.71

Age group 4

12

47.80

9.72

On the control sample

Age group 1

17

55.44

11.31

Age group 2

11

56.09

10.50

Age group 3

10

41.70

16.54

Age group 4

12

47.80

9.75