There are situations where it would be desirable to manipulate the subjective time, and many studies have proposed methods to manipulate the subjective time for purposes such as reducing waiting time. However, it isn't easy to use previous methods in various situations because most of them use visual and auditory information. This study proposes a method to manipulate the subjective time by tactile stimuli of wrist-worn devices. Since wrist-worn devices such as smartwatches are widely used and can present tactile stimuli at any time, our method can be used without blocking visual or auditory perception channels. We designed tactile stimuli presentation methods that change the number of stimuli. The evaluation result clarified the elements of tactile stimuli that intentionally changed the subjective time and confirmed that our method could change the subjective time by about 21% (from -3% to 18%). Since few studies focused on the phenomenon that the subjective time changes depending on tactile stimuli of information devices, our study can contribute to designing information devices and user experiences. CCS CONCEPTS• Human-centered computing → Human computer interaction (HCI).

There are situations where manipulating subjective time would be desirable, such as reducing waiting time, and there are many studies to manipulate subjective time. However, it is not easy to use previous methods in various situations because most of them use visual and auditory information. This study proposes a method to manipulate the subjective time by the tactile stimuli from wrist-worn devices. We designed three types of tactile stimuli presentation methods that change the number, the duration, and the time interval of the stimuli. The evaluation result clarified the elements of the tactile stimuli that intentionally changed the subjective time and confirmed that our method can change the subjective time by about 23% (from −6% to +17%). Since few studies have focused on the phenomenon in which the subjective time changes depending on the tactile stimuli from information devices, our findings can contribute to designing information devices and user experiences.

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