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Usability Study of Two In-Vehicle Information Systems Using Finger Tracking and Facial Expression Recognition Technology

ABSTRACT In this study, an experiment is conducted to compare the usability of two in-vehicle information systems (IVISs), namely, the newly developed “Calink” and the commercially available “Carlife.” The interface style of Calink is similar to that of smartphones, while that of Carlife is similar to the interface style of traditional IVISs. This study establishes a usability index system based on the International Organization for Standardization’s definition of usability, and each evaluation index has a corresponding subjective or objective measurement method. Five new indexes, namely, angular velocity, velocity, turn angle, distance of finger movements, and valence and arousal value of facial expression, are used in the usability test. Participants are asked to complete three tasks (namely, music, telephone, and navigation) to test the usability of the IVIS interface. The results show that in the case of most of the indexes Calink performs better than Carlife. Finally, the consistency of subjective experience and objective performance is discussed.