Older and younger drivers' perceived workload when driving with adaptive equipment

When physical impairment impedes a driver's access to a vehicle's controls, adaptive equipment can compensate for functional loss. However, the impact of modifying automotive controls and the effectiveness of driver-training remain unclear. Of particular importance is the older driver's ability to integrate these adaptations.; This thesis comprises two studies comparing older and younger drivers' perceived workload when driving with adaptive devices. First, workload ratings in normal driving were compared to ratings while driving using hand-controls to activate the vehicle's pedals. Significant increases in workload were observed for younger and older drivers. The second study evaluated the effect of driver-training on workload, comparing ratings prior to and following three hours of training. Although training was effective in reducing workload, seniors' scores did not return to baseline levels as did the younger drivers', and gender differences were observed. Clinically, the studies support the need for training. Age and gender may impact training-response.