Explains Applied Behaviour Analysis (ABA), the systematic implementation of scientifically proven behavioural principles to develop skills in children. [The book] concludes by pointing out that, although there is ample evidence for the effectiveness of behaviour analysis and parents' education as autism therapists, these findings have not permeated all professional circles. They emphasise the child's right to scientifically validated and effective treatment and point to some problems that parents may encounter should they decide to pursue training in the science of behaviour.