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Virtual Big Heads: Analysis of Human Perception and Comfort of Head Scales in Social Virtual Reality

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PubDate: May 2020

Teams: University of Central Florida

Writers: Zubin Choudhary; Kangsoo Kim; Ryan Schubert; Gerd Bruder; Gregory F. Welch

PDF: Virtual Big Heads: Analysis of Human Perception and Comfort of Head Scales in Social Virtual Reality

Abstract

Virtual reality (VR) technologies provide a shared platform for collaboration among users in a spatial context. To enhance the quality of social signals during interaction between users, researchers and practitioners started augmenting users’ interpersonal space with different types of virtual embodied social cues. A prominent example is commonly referred to as the “Big Head” technique, in which the head scales of virtual interlocutors are slightly increased to leverage more of the display’s visual space to convey facial social cues. While beneficial in improving interpersonal social communication, the benefits and thresholds of human perception of facial cues and comfort in such Big Head environments are not well understood, limiting their usefulness and subjective experience.In this paper, we present a human-subject study that we conducted to understand the impact of an increased or decreased head scale in social VR on participants’ ability to perceive facial expressions as well as their sense of comfort and feeling of “uncanniness.” We explored two head scaling methods and compared them with respect to perceptual thresholds and user preferences. We further show that the distance to interlocutors has an important effect on the results. We discuss implications and guidelines for practical applications that aim to leverage VR-enhanced social cues.

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