Table 1

Participant characteristics and cognitive test scores

Cognitive and behavioral measures

Attentive group

N = 41

(20 boys, 21 girls)

Inattentive group

N = 10

(5 boys, 5 girls)

Attentive vs. Inattentive

Mean SD

Range

Mean SD

Range

t-test score

Inattention

(1 = low, 7 = high)

2.8 (1.6)

1 - 7

6.2 (0.4)

1 - 7

t(49) = 6.67***

Hyperactivity

(1 = low, 7 = high)

2.5 (1.6)

1 - 7

4.9 (2.0)

1 - 7

t(49) = 4.11***

School performance

(1 = below, 2 = average, 3 = above)

2.3 (0.7)

1 - 3

2.1 (0.7)

1 - 3

t(49) = 0.94

Reading skill

(1 = low, 7 = high)

5.0 (2.0)

1 - 7

3.5 (1.7)

1 - 7

t(49) = 2.38*

Raven score

41.2 (8.6)

16 - 55

37.3 (10.6)

19 - 53

t(49) = 1.09

Digits forward

23.1 (9.1)

4 - 42

15.0 (6.6)

4 - 23

t(49) = 3.22**

Digits backwards

14.9 (6.9)

2 - 34

13.2 (4.2)

7 - 18

t(49) = 0.97

Note: * p < .05, ** p < .01, *** p < .001

Söderlund et al. Behavioral and Brain Functions 2010 6:55   doi:10.1186/1744-9081-6-55