ERIC Number: EJ811272
Record Type: Journal
Publication Date: 2008-Oct
Abstractor: As Provided
Reference Count: 0
ADHD and Behavioral Inhibition: A Re-Examination of the Stop-Signal Task
Alderson, R. Matt; Rapport, Mark D.; Sarver, Dustin E.; Kofler, Michael J.
Journal of Abnormal Child Psychology, v36 n7 p989-998 Oct 2008
The current study investigates two recently identified threats to the construct validity of behavioral inhibition as a core deficit of attention-deficit/hyperactivity disorder (ADHD) based on the stop-signal task: calculation of mean reaction time from go-trials presented adjacent to intermittent stop-trials, and non-reporting of the stop-signal delay metric. Children with ADHD (n = 12) and typically developing (TD) children (n = 11) were administered the standard stop-signal task and three variant stop-signal conditions. These included a no-tone condition administered without the presentation of an auditory tone; an ignore-tone condition that presented a neutral (i.e., not associated with stopping) auditory tone; and a second ignore-tone condition that presented a neutral auditory tone after the tone had been previously paired with stopping. Children with ADHD exhibited significantly slower and more variable reaction times to go-stimuli, and slower stop-signal reaction times relative to TD controls. Stop-signal delay was not significantly different between groups, and both groups' go-trial reaction times slowed following meaningful tones. Collectively, these findings corroborate recent meta-analyses and indicate that previous findings of stop-signal performance deficits in ADHD reflect slower and more variable responding to visually presented stimuli and concurrent processing of a second stimulus, rather than deficits of motor behavioral inhibition.
Descriptors: Auditory Stimuli, Reaction Time, Construct Validity, Validity, Inhibition, Attention Deficit Hyperactivity Disorder, Behavior Problems, Computation, Comparative Analysis
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A