Stop signal and Conners' continuous performance tasks: test--retest reliability of two inhibition measures in ADHD children.
OBJECTIVE
To measure test-retest reliability of the Stop-Signal Task (SST) and the Conners' Continuous Performance Test (CPT) in children with ADHD.


METHODS
12 children with ADHD (age 11.46 +/-1.66) participated in the study. Primary outcome measures were stop-signal reaction time (SSRT) for the SST and CPT's commission errors (%FP). For each participant, we acquired three morning (8:00am) measurements and behavioral observations, separated by two 7-day intervals. Reliability of cognitive measures and behavioral observations was measured using the Intraclass-correlation coefficient (ICC).


RESULTS
ICC values for SSRT and %FP were 0.72. Consistency of behavioral observations was much lower (ICC =0.41).


CONCLUSIONS
Both the SST and the CPT yielded reliable measurements in ADHD children. Our findings lend further support to using these measures in the study of ADHD.
Soreni
Noam
N
University of Toronto, Ontario, Canada.
Crosbie
Jennifer
J
Ickowicz
Abel
A
Schachar
Russell
R
D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D002648:Child; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D008297:Male; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D010552:Personality Assessment / Q000706:statistics & numerical data; D011594:Psychometrics / Q000706:statistics & numerical data; D011597:Psychomotor Performance; D011930:Reaction Time; D015203:Reproducibility of Results