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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: J Child Psychol Psychiatry. 2019 Mar 18;60(8):917–926. doi: 10.1111/jcpp.13042

Table 1.

Sample Characteristics

ADHD TD Group Difference
n 85 34
Females 24 (28.2%) 13 (38.2%) χ2= 1.13, p=.29
Age 10.5 yrs 10.3 yrs t=0.3, p=.73
FSIQ 103.3 109.6 t=2.5, p=.02
SWAN inattention 14.0 36.0 t=14.4, p<.001
SWAN hyperactive 20.6 37.4 t=9.3, p<.001
Task Performance
Accuracy 74.1% 80.2% t=3.4, p=.001
RT 1357 ms 1377 ms t=0.4, p=.68
RTsd 430 ms 405 ms t=1.3, p=.19

Notes. SWAN=Strengths and Weaknesses of ADHD symptoms and Normal behavior rating scale (higher indicates fewer attention problems); FSIQ=Full Scale IQ; RT=reaction time; RTsd=response time standard deviation.