Time perception deficits in Attention-Deficit/Hyperactivity Disorder and Comorbid reading difficulties in child and adolescent samples

dc.contributor.authorToplak, M.E.
dc.contributor.authorRucklidge, J.J.
dc.contributor.authorHetherington, R.
dc.contributor.authorJohn, S.C.F.
dc.contributor.authorTannock, R.
dc.date.accessioned2007-11-13T01:41:55Z
dc.date.available2007-11-13T01:41:55Z
dc.date.issued2003en
dc.description.abstractObjective: To investigate time perception in Attention-Deficit/Hyperactivity Disorder (ADHD) with and without comorbid reading difficulties (RD) in child and adolescent participants. Method: In study 1, 50 children with ADHD (31 ADHD, 19 ADHD+RD) and age-matched healthy controls (n=50), completed three psychophysical tasks: duration discrimination (target duration of 400 ms versus a foil duration), frequency discrimination (a control condition to evaluate general perceptual ability), and a duration estimation task using the method of reproduction for intervals of 400 ms, 2000 ms, and 6000 ms. Study 2 used the same tasks with an adolescent sample (35 ADHD, 24 ADHD+RD, 39 controls). Results: In both studies, children and adolescents with ADHD and ADHD+RD displayed some impairments in duration discrimination and the precision with which they reproduced the intervals on the estimation task, particularly the shorter 400 ms interval. The most severe impairments tended to occur in the comorbid ADHD+RD group. No impairments were found on the frequency discrimination task. ADHD participants also displayed significant intraindividual variability in their performance on the estimation task. Finally, working memory, estimated full-scale IQ, and teacher report of hyperactivity/impulsivity were found to differentially predict performance on the time perception measures in the adolescent clinical sample. Conclusions: Deficits in duration discrimination, duration estimation, and intra-individual performance variability may have cascaded effects on the temporal organization of behaviour in children and adolescents with ADHD and ADHD+RDen
dc.identifier.citationToplak, M.E., Rucklidge, J.J., Hetherington, R., John, S.C.F., Tannock, R. (2003) Time perception deficits in Attention-Deficit/Hyperactivity Disorder and Comorbid reading difficulties in child and adolescent samples. Journal of Child Psychology and Psychiatry and Allied Disciplines, 44, pp. 888-903.en
dc.identifier.doihttps://doi.org/10.1111/1469-7610.00173
dc.identifier.issn0021-9630
dc.identifier.urihttp://hdl.handle.net/10092/586
dc.language.isoen
dc.rights.urihttps://hdl.handle.net/10092/17651en
dc.subjecttime perceptionen
dc.subjectworking memoryen
dc.subjectattention-deficit/hyperactivity disorderen
dc.subjectreading difficultiesen
dc.subjectteacher reporten
dc.subjectbehaviour ratingsen
dc.subject.marsdenFields of Research::380000 Behavioural and Cognitive Sciences::380100 Psychology::380102 Learning, memory, cognition and languageen
dc.subject.marsdenFields of Research::380000 Behavioural and Cognitive Sciences::380100 Psychology::380101 Sensory processes perception and performanceen
dc.titleTime perception deficits in Attention-Deficit/Hyperactivity Disorder and Comorbid reading difficulties in child and adolescent samplesen
dc.typeJournal Article
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