How Drivers Categorize ADAS Functions -Insights from a Card Sorting Study

摘要

Advanced driver assistance systems (ADAS) are intelligent systems that can help vehicle drivers to drive with ease and safety. A growing body of ADAS technologies bring benefits to vehicle drivers. However, understanding increasing ADAS terminologies becomes a potential problem for ordinary drivers. An individual open card sorting study was conducted to test Chinese driver's mental model of ADAS categories. 14 private car drivers were invited to do card sorting, visualizing their mental model of ADAS function categorization. 18 ADAS-related terminologies and their brief explanations were printed on separate paper cards. Participants are told to sort these cards into groups and then name their card groups as what they would want to see in their own cars. To analyze card sorting result, 2 researchers merged similar group names into 7 groups: Driving Assist, Collision Prevention, Safety Setting, Parking Assist, Start-Stop Assist, Information, and General. 15 out of 18 cards can be clearly grouped, being put under the same group by more than (or equals) 40% participants. 3 out of 7 group get cards clearly followed. They are Driving Assist, Collision Prevention, and Parking Assist. We also compare the result with Troppmann's Model and United States Department of Transportation (NHTSA, 2020) Model and find Chinese drivers tend to use a different driving status clue. The result suggests ADAS technology categories maybe different between industry practice and Chinese private drivers' mental model. Culture influence and ADAS knowledge can be possible reasons for the difference.