Definition of the dimensions covered by the DRIVESC2 test set was based on information from current theoretical models of driving behavior and empirical data analysis. Particular attention was paid to empirical studies of the use of psychometric tests to predict driving behavior in people with neurological disorders, especially various forms of dementia or mild neurocognitive disorders.
The findings of recent meta-analyses indicate that impairments of attention, the executive functions or visual-spatial abilities are likely to have an adverse effect on driving behavior. To cover these dimensions efficiently, the test set uses established tests such as the TMT-L Trail Making Test – Langensteinbach version and the LAT Line Orientation Test.
Part A of the TMT-L measures information processing speed and attention, which play a part in action planning and concrete implementation of the driving process. Part B of the TMT-L measures cognitive flexibility, which makes an important contribution to action planning and the handling of unforeseen situations. In addition, the LAT provides information on basic visual-spatial perception ability, which is called for in connection with tasks such as maneuvering the vehicle, estimating distances and predicting traffic situations.
A study of this issue is being conducted by SCHUHFRIED with LMU Munich and the kbo-Inn-Salzach-Klinikum; it is due to be completed by the end of 2020.