Using a Smartwatch to Evaluate Subjective Ratings of Driving Functions

Automating the driving task fundamentally changes the user's driving experience. The driving function now dictates the driving style, previously a product of individual decisions by the driver. Consequently, understanding what constitutes a comfortable driving style becomes essential for ensuring the optimal design of driving functions. This knowledge can be acquired through user studies. As self-reports are often distorted, physiological data can help provide a more objective insight into the emotions and feelings of the test subjects. Smartwatches serve as a convenient and uncomplicated measuring device in this context. The aim of this paper is to investigate whether the accuracy of a smartwatch is sufficient to infer user perceptions and subjective ratings. To achieve this, a subject study is conducted using a driving simulator.