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Behavioural Neurology
Volume 2015, Article ID 254868, 10 pages
Research Article

Self-Reported ADHD Symptoms and Interhemispheric Interaction in Adults: A Dimensional Approach

1Department of Clinical & Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS Groningen, Netherlands
2Department of Psychology, Beni-Suef University, Salah Salem Street, Beni-Suef 62511, Egypt

Received 2 February 2015; Revised 4 May 2015; Accepted 7 May 2015

Academic Editor: Veit Roessner

Copyright © 2015 Saleh M. H. Mohamed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present study applied the dimensional approach to test whether self-reported symptoms of Attention Deficit/Hyperactivity Disorder (ADHD) in adults are associated with the speed of interhemispheric interaction. A sample of first grade students () completed Conners’ Adult ADHD Rating Scales and letter matching reaction time tasks. In the tasks, participants had to match a single target letter displayed below the fixation cross, either on left or right visual field, with one of two letters displayed above the fixation cross, one letter on each visual field. For each task, identical letters were presented either within the same visual field (within hemisphere condition) or across visual fields (across hemisphere condition). Interhemispheric interaction was indexed as the difference in mean reaction time between within and across hemisphere conditions. Comorbid problems such as depression, anxiety, and stress may affect task performance and are controlled for in this study. Findings indicated that self-reported ADHD symptomology, especially hyperactivity, in the presence of stress was weakly but significantly associated with fast interhemispheric interaction.