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Table 1 Participant characteristics and cognitive test scores

From: The effects of background white noise on memory performance in inattentive school children

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