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Résumé :
The aim of this study was to provide a large scope (multidimensional) analysis of the deficits in timing in children with attention-deficit with hyperactive disorder (ADHD).
Timing performance in fifteen ADHD children was compared to those of twenty children using temporal generalization task. To ensure a more thorough analysis, both visually based timing and sound based timing were evaluated. Timing in each modality was also evaluated for brief durations (<1s) as well as for longer ones (in the order of seconds).
Our main findings were that :
1. ADHD subjects show below normal timing ability mainly on sounds. Temporal processing was not found to be deficient when the durations of visual stimuli were to be estimated.
2. ADHD subjects could generally identify temporal durations just as well as controls, but they were less apt at distinguishing between them
3. The perception of brief sounds were distorted in ADHD subjects and perceived as being longer (+ 200 ms) as they actually were.
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