Browsing by Author "Kuzuoka, Hideaki"

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    Controlling the Distribution of Salty Taste Intensity on the Tongue Using Extraoral Galvanic Taste Stimulation
    (The Eurographics Association, 2023) Tanaka, So; Narumi, Takuji; Amemiya, Tomohiro; Kuzuoka, Hideaki; Aoyama, Kazuma; Abey Campbell; Claudia Krogmeier; Gareth Young
    Galvanic taste stimulation (GTS) alters taste intensity by applying a weak electric current around the oral cavity. Previous studies on GTS have captured the overall trend of taste changes in the oral cavity produced by GTS. However, it is not well known whether the potentiating or inhibitory effects of GTS result in a spatial gradient of taste perception in the oral cavity. Therefore, in this study, we examined the possibility of spatially selective modulation of taste intensity produced in the oral cavity by GTS. The results suggested that it is possible to present the intensity gradient of the perceived taste in the frontback and left-right directions, depending on the arrangement of the electrodes. These results are expected to contribute to the presentation of taste changes that are close to the actual eating and drinking experience, and to the provision of a new taste experience in which the taste is perceived as it moves through the oral cavity.
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    Influence of Pseudo-haptic Weight on Product Rarity Valuation
    (The Eurographics Association, 2023) Okura, Naoya; Oyanagi, Akemi; Narumi, Takuji; Kuzuoka, Hideaki; Amemiya, Tomohiro; Abey Campbell; Claudia Krogmeier; Gareth Young
    There has been an increasing number of online shopping services that employ VR technologies so that they give customers more realistic experiences and amplify purchase intention. Meanwhile, it is known that the actual product's weight perception affects its valuation. However, verification of this phenomenon in virtual environments has rarely been reported. This study investigated the influence of weight perception generated by pseudo-haptics on product rarity valuation and purchase intention in virtual environments. The results suggest that, although individual and product differences were observed, the overall trend was that product rarity valuation was higher when the user's perceived weight was heavier than when the perceived weight was lighter.