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Effects ofHand Color Change on User's Psychological State During a Pseudo Handshake

In recent years, social VR (Virtual Reality) contents for communication have become more and more active. However, social VR contents cannot convey a sense of touch or warmth during the pseudo-body contact. This study investigated whether changing the color of a hand during the pseudo-body contact in virtual reality can produce temperature sensations and a sense of contact from visual stimuli. In addition, changing the color of the hand may affect not only the temperature illusion but also the user’s psychology. Therefore, in order to induce the temperature illusion, the color of the hand during the simulated handshake was changed, and the evaluation of the sense of contact, closeness, and the user’s psychological state was investigated in a subject experiment. The results showed that warm colors of the hands can make users feel warm and enhance the sense of contact. When the color of one’s own hand and the other’s hand were warmer than each other, the feeling of closeness increased. When the other person’s hand is in the cold color, people feel coldness, and increase negative feelings toward the other person, such as a decrease in happiness, and a feeling of anxiety and disgust. By investigating and clarifying the effects of pseudo-body contact in a virtual space, this study contributes to providing an environment for high quality communication in social VR contents.