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Table 1 Participant characteristics

From: Behavioral sensitivity of Japanese children with and without ADHD to changing reinforcer availability: an experimental study using signal detection methodology

 

Control

ADHD

(n = 22)

(n = 19)

Mean

sd

Range

Mean

sd

Range

Age (months)a

122.73

20.48

86–149

107.74

14.78

89–137

Estimated IQ

98.00

12.29

84–121

104.47

14.91

77–126

Boys, n (%)

11 (50%)

19 (100%)

Stimulant medication (concerta), n

–

4

Subtype, n: inattentive/hyperactivity_impulsivity/combined

–

10/1/8

Comorbidity, n: oppositional defiant disorder

 

3

Language/Tic/asperger disorderb

 

1/1/2

  1. a The mean age was significantly higher for the control than ADHD group (t(39) = 2.65, p < .05)
  2. b Given that DSM-5 allows comorbid diagnosis of ASD with ADHD, children demonstrating symptoms of DSM-IV asperger disorder were included in the study if they satisfied other inclusion criteria. However, those demonstrating symptoms consistent with autistic disorder were excluded from the study due to accompanying cognitive impairments