Franck et al. (2013) [27]

49

43

33.5

12

2

executive function (effect size not available), attention (effect size not available), verbal memory (effect size not available), visuospatial abilities (effect size not available), working memory (effect size not available)

executive function, attention, verbal memory, visuospatial abilities, working memory

Garrido et al. (2013) [28]

31

18

33.3

24

2

speed of processing (0.30), working memory (0.44), reasoning and problem solving (0.30 - 0.52)

attention/vigilance, working memory, reasoning and problem solving, verbal learning, speed of processing

Hubacher et al. (2013) [29]

15

14

41.9

4

4

verbal working memory (effect size not available)

verbal and visual short term memory, verbal and working memory

Tan et al. (2013) [30]

36

34

34.7

12

3

executive function (effect size not available), verbal memory (effect size not available), attention (effect size not available), working memory(effect size not available), psychomotor speed(effect size not available)

executive function, verbal memory, attention, working memory, psychomotor speed

Trapp et al. (2013) [31]

30

30

36.65

12

1

problem solving (0.63 - 1.29), memory (0.85 - 1.13) and attention (0.35 - 0.36)

problem solving, memory and attention, speed of processing