Browsing by Author "Curry, Christopher"

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    APAL 2019: Postural Data, Game Performance, and Subjective Responses of Cybersickness in Virtual Reality Head-Mounted Displays
    (2019-12-16) Curry, Christopher; Li, Ruixuan; Peterson, Nicolette; Stoffregen, Thomas; curry134@umn.edu; Curry, Christopher; University of Minnesota Affordance Perception-Action Laboratory
    Cybersickness is a subset of motion sickness and is experienced by users after they are immersed in a computer-generated virtual environment. Prior motion sickness research has shown that individuals that become motion sick display distinct kinematic patterns that differ from those that do not become sick. For this reason, kinematic data were collected before virtual reality (VR) exposure, and during exposure. Following exposure, some participants reported motion sickness. Subjects that reported motion sickness were classified into the sickness group, while those that did not report any symptoms were classified into the well group. This data set includes the collected kinematic data, subjective responses on the simulator sickness questionnaire, and game performance data. Kinematic data was collected before exposure via a force plate, and during exposure using a Polhemus Electromagnetic Tracker. The data are shared to follow guidelines as required by the journals we are submitting to.
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    APAL Coupling Study 2019
    (2019-03-04) Walter, Hannah; Li, Ruixuan; Munafo, Justin; Curry, Christopher; Peterson, Nicolette; Stoffregen, Thomas; walte666@umn.edu; Walter, Hannah; University of Minnesota Affordance Perception-Action Lab
    Motion sickness is preceded by differences in the quantitative kinematics of body sway between individuals who (later) become sick and those who do not. In existing research, this effect has been demonstrated only in measures of body sway, relative to the earth. However, body sway can become coupled with imposed oscillatory motion of the illuminated environment, and the nature of this coupling may differ between individuals who become sick and those who do not. We asked whether body sway would become coupled to complex oscillations of the illuminated environment, and whether individual differences in such coupling might be precursors of motion sickness. Standing participants were exposed to complex oscillation of the illuminated environment. We examined the strength of coupling as a function of time during exposure. Following exposure, some participants reported motion sickness. The nature and temporal evolution of coupling differed between participants who later reported motion sickness and those who did not. Our results show that people can couple the complex dynamics of body sway with complex imposed motion, and that differences in the nature of this coupling are related to the risk of motion sickness.
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    Cybersickness in Virtual Reality Head-Mounted Displays: Examining the Influence of Sex Differences, Vehicle Control and Postural Precursors
    (2021-05) Curry, Christopher
    The auspicious future of virtual reality could be thwarted by cybersickness.Cybersickness can be thought of as a subset of motion sickness and like motion sickness is more common among women than among men. Additionally, motion sickness is more common among passengers than among drivers. In this dissertation research, it was asked whether these two effects might interact. In a yoked-control design using a head-mounted display, one member of each pair drove a virtual automobile, while the other member watched a recording of the driver’s performance. In Chapter 2, it is explored whether such an interaction existed and the overall rates of cybersickness amongst these two groups. Previous research has shown that the subjective experience of cybersickness often is preceded by distinctive patterns of movement. In Chapter 3, it is examined whether such postural precursors of cybersickness might exist before participants were exposed to a virtual driving game presented. In this chapter, participants standing body sway was gathered while participants performed simple visual tasks (staring at a blank page vs. counting target letters in a block of text). In Chapter 4, movement of the head and torso was recorded while participants were exposed to a driving video while seated. These three chapters further inform the current understanding of cybersickness, and whether certain factors of the virtual environment may increase the likelihood of individuals becoming cybersick. Furthermore, chapters 3 and 4 further explore whether movement data can be used as an objective predictor in cybersickness research. If movement data further proves to be an objective predictor then this approach can be one iii of many approaches to assuage cybersickness for highly susceptible individuals.