From:  Cognitive control in children with ADHD and subthreshold ADHD: an eye-tracking study

 Demographic characteristics of the three groups participating in the experiment.

Groups (n = 102)MeasuresValues
ADHD-C (n = 34)n, boys/girls19/15
Age, M (SD)7.21 (1.24)
IQ (Raven), M (SD)102.00 (5.24)
SDAI–inattention, M (SD)19.60 (2.50)
SDAI–hyperactivity, M (SD)18.10 (2.30)
Subthreshold ADHD (n = 34)n, boys/girls18/16
Age, M (SD)7.25 (1.22)
IQ (Raven), M (SD)102.10 (9.10)
SDAI–inattention, M (SD)15.90 (2.50)
SDAI–hyperactivity, M (SD)11.80 (1.60)
TD (n = 34)n, boys/girls18/16
Age, M (SD)6.99 (1.20)
IQ (Raven), M (SD)105.50 (7.95)
SDAI–inattention, M (SD)2.00 (0.20)
SDAI–hyperactivity, M (SD)3.00 (0.31)

ADHD-C: attention-deficit/hyperactivity disorder-combined subtype; SDAI: ADHD Rating Scale–IV: School Version; TD: typically developing.