These tests not only detect deficiences but also serve as an instrument for counselling and assignment of rehabilitation and therapy measures for DWI offenders. These tasks are mainly assumed by about 400 especially trained traffic psychologists working in about 80 authorized medico-psychological test centers and in about 130 rehabilitation centers under the technical supervision of the federal states. The quality of the measures is continually checked by the organizing institutions themselves and by the responsible supervising authorities. In the framework of the probationary license system, obligatory courses for driving beginners detected for DWI have become an indispensable element. They include an initial screening conversation and 9 lessons divided into three small-group sessions directed by especially trained traffic psychologists.
Many reasons can lead to the success or failure of the mentioned rehabilitation programmes.
First offenders tested before participating in an improvement course should be informed early about possible aptitude deficits so that they have the opportunity to take appropriate measures while the license is still suspended. General prevention based on judicial sanctioning of DWI offenses is thereby complemented by specific prevention. The mandatory medico-psychological driver aptitude testing may give directions to mulitple offenders with deficiencies strictly disqualifiying them from driving as to if and how they could correct their deficiencies. One possible way is the participation in a rehabilitation course for DWI offenders. Due to the fact that the criteria for the participation in rehabilitation and driver improvement measures have been intensively tested in Germany and that the recidivism risk factors are taken into consideration, the degree of effectiveness of these courses is good.