<P>For over 100 years, ADHD has been seen as essentially a behavior disorder. Recent scientific research has developed a new paradigm which recognizes ADHD as a developmental disorder of the cognitive management system of the brain, its executive functions. This cutting-edge book pulls together key ideas of this new understanding of ADHD, explaining them and describing in understandable language scientific research that supports this new model. It addresses questions like: </P><P></P><P>- Why can those with ADHD focus very well on some tasks while having great difficulty in focusing on other tasks they recognize as important? </P><P>- How does brain development and functioning of persons with ADHD differ from others?</P><P>- How do impairments of ADHD change from childhood through adolescence and in adulthood?</P><P>- What treatments help to improve ADHD impairments? How do they work? Are they safe?</P><P>- Why do those with ADHD have additional emotional, cognitive, and learning disor