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Table 1 Demographic Characteristics and Assessment of the Sample

From: Working memory and decision making in children with ADHD: an analysis of delay discounting with the use of the dual-task paradigm

  ADHD Group (n = 16; M:F = 12:4) Control Group (n = 16; M:F = 12:4) Comparison between Groups
Variable Mean SD Full Range Mean SD Full Range t df p
Age (years) 8.75 .45 8–9 8.63 .62 8–10 .655 30.0 .518
IQ 99.8 6.3 93–110 102.2 4.2 96–113 1.29 30.0 .208
SDAI-H* 16.0 1.5 14–19 .188 .750 0–3 38.5 22.4 <.001**
SDAI-I* 16.7 .9 15–18 .000 .000 0–0 70.5 15.0 <.001**
Time* 15.6 .5 15–16 15.8 .4 15–16 1.17 28.7 .252
Money* 15.7 .5 15–16 15.9 .3 15–16 1.19 22.6 .077
Memory Span 5.56 1.03 4–8 5.57 .78 5–7 .582 30.0 .565
Half Memory Load 2.63 .61 2–4 2.63 .50 2–3 .000 30,0 1.00
  1. * Equal Variance Not Assumed, Signifcant Levene’s Test of Equality of Variances
  2. ** The different is significant with alpha < .05