Attention deficit/hyperactivity disorder is a common developmental disorder that can cause a motor-skill delay in children. Positive illusory bias (PIB)--the belief that one is better at performing a task or a skill than one actually is--may be one cause of this delay. Although nearly everyone experiences a mild and healthy PIB, students with ADHD…

Since Piaget, the view that motor and cognitive development are interrelated has gained wide acceptance. However, empirical research on this issue is still rare. Few studies show a correlation of performance in cognitive and motor tasks in typically developing children. More specifically, Diamond A. (2000) hypothesizes an involvement of executive…