While there have been significant advances in both the behaviour genetics and molecular genetics of Attention Deficit Hyperactivity Disorder (ADHD), researchers are now beginning to develop hypotheses about relationships between phenotypes and genetic mechanisms. Twin studies are able to model genetic, shared environmental and non-shared…

This article examines the decision-making processes that Western Australian parents utilise when deciding whether to medicate or not to medicate their child diagnosed with Attention Deficit Hyperactivity Disorder. Thirty-three parents (five fathers and 28 mothers) from a wide range of socio-economic status suburbs in Perth, Western Australia were…

This study aimed at investigating whether one of the key deficits in Attention Deficit Hyperactivity Disorder (ADHD), slow response inhibition, predicted the response to methylphenidate (MPH) treatment. In order to address this issue, we used Stop Signal Reaction Times (SSRTs) measured at baseline in 20 medication-naive boys with ADHD as…

This research investigated the frequency discrimination performance of a 6-year-old boy (MH) with language and attentional difficulties. MH had been reported to have literacy problems not paralleling an advanced verbal ability, and he showed difficulties in discriminating non-verbal tones of different frequencies in comparison with children of his…