From the very beginning Tomatis® Nordiska AB has put much effort into developing administrative, technical, and measurement processes in delivering Tomatis® training, and to document their work. It is these efforts that have made an evaluation possible. The client documentation encompasses personal characteristics, needs or problem areas, present and previous health situation, as well as data about the training, such as hours of training, number of weeks between the completion of the training and the final evaluation, and a self-rating questionnaire administered once before the training and a second time four to six months after completed training.(…) One conclusion that can be drawn, is that the training appears to have beneficial effects on concentration and attention difficulties, as well as on social adaptation and behaviour, in both adults and children, even in severe cases.