Based on a previous experiment, the validity of the fixed-base vehicle simulator of the institute for perception TNO was studied once again during straight road driving. In the present study simulator dynamics were made in closer correspondence with those of the real car. Absolute and relative validity were evaluated in terms of system performance and driver behaviour for inexperienced and experienced drivers who both had to perform lateral and longitudinal vehicle control in the simulator and in an instrumented car on the road. Each control was varied with a free and forced accuracy instruction resulting in four levels of task demands. Sequence effects between simulator and instrumented car and training effects on each system were also studied. In addition, drivers were asked to give their comments on questionnaires. Overall results showed a good absolute and relative validity for longitudinal vehicle control, while lateral vehicle control offered a good relative validity. Absolute validity was lacking in the latter control due to a worse perception of lateral translations (absence of kinaesthetic feedback). Yaw rotations were perceived in the simulator quite well. (Author/publisher) For abstract of the previous experiment (progress report 1) see B 15388 (IRRD abstract no 243317).
Abstract