A simulator was used in this US study to investigate the types of tasks that were most distracting and the sources of these distractions. It also explored the workload associated with a variety of modes of use of in-vehicle information systems (IVIS) designed by OEMs, and compared these different modes of interaction to gauge differences in workload that result from their use. IVIS involve complex multimodal interactions to perform the secondary tasks. The testing for this study involved an assessment of up to four tasks, audio entertainment, calling and dialing, text messaging, and navigation, and up to three modes of interaction. A total of 31 participants took part in the study and their ages ranged from 21 to 70 years.
Results demonstrated that the most demanding feature of the IVIS is the destination feature for navigation. Additionally, using the IVIS text messaging feature was associated with a significantly higher level of workload demand than other tasks. Based on these study results, authors proposed that greater consideration should be given to the types of IVIS features that are available to drivers when the vehicle is in motion.
Strayer, D. L., Cooper, J. M., Goethe, R. M., McCarty, M. M., Getty, D., & Biondi, F. (2017). Visual and Cognitive Demands of Using In-Vehicle Infotainment Systems.