It is important to understand where rage (or intermittent explosive disorder) comes from. It is not just the result of bad parenting or the child not trying hard enough. It is also not just an example of the child being manipulative, calculating, or choosing to behave badly. Rage is the natural reaction that all people have when they are overloaded beyond their capacity to cope. Most people rarely, if ever, reach that point though. These children, because of the disorders they have, are frequently enduring more ‘brain overload’ than people typically have to put up with. They do not have “low frustration tolerance” – they have more frustrations TO tolerate!
Read more below:
http://www.eparent.com/features-3/brake-shop-putting-the-brakes-on-rage/