EdDaou, Ed-Shamieh, (2015). “The effect of playing chess on the concentration of ADHD students in the 2nd cycle”, Procedia – Social and Behavioural Sciences, 192, 2015. This study examined the effect of playing regular chess on a group of children, aged 11-13, with ADHD. The study showed a significant increase in the length of time for which children could focus on a particular task before disruptive behaviour began, suggesting an improvement in self-regulation.