ERIC Number: EJ725499
Record Type: Journal
Publication Date: 2005-Oct-1
Time Perception: Modality and Duration Effects in Attention-Deficit/Hyperactivity Disorder (ADHD)
Toplak, Maggie E.; Tannock, Rosemary
Journal of Abnormal Child Psychology, v33 n5 p639 Oct 2005
Time perception performance was systematically investigated in adolescents with and without attention-deficit/hyperactivity disorder (ADHD). Specifically, the effects of manipulating modality (auditory and visual) and length of duration (200 and 1000 ms) were examined. Forty-six adolescents with ADHD and 44 controls were administered four duration discrimination tasks and two control tasks, and a set of standardized measures. Participants with ADHD had higher thresholds than controls on all of the duration discrimination tasks, with the largest effect size obtained on the visual 1000 ms duration discrimination task. No group differences were observed on the control tasks. Visual-spatial memory was found to be a significant predictor of visual and auditory duration discrimination at longer intervals (1000 ms) in the ADHD sample, whereas auditory verbal working memory predicted auditory discrimination at longer intervals (1000 ms) in the control sample. These group differences suggest impairments in basic timing mechanisms in ADHD.
Descriptors: Memory, Adolescents, Hyperactivity, Auditory Discrimination, Attention Deficit Disorders, Learning Modalities, Time, Developmental Tasks, Visual Discrimination, Spatial Ability
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A