The Effect of Optical Flow Motion Direction on Vection Strength

Fujii, Yoshitaka; Seno, Takeharu

doi:10.1177/2041669519899108

Cited by 21 publications

(13 citation statements)

References 49 publications

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“…Any deficits in processing optic flow information should distort self-motion perception. Studies have found that vection strength is influenced by changes in the pattern of retinal motion 12 – 14 . It was found that reducing retinal adaptation to visual motion, such as by oscillating around a fixation point, appeared to help sustain the sensitivity to retinal motion stimulation caused by optic flow, which generated stronger overall vection 12 – 14 .…”

Section: Introductionmentioning

confidence: 99%

“…Studies have found that vection strength is influenced by changes in the pattern of retinal motion 12 – 14 . It was found that reducing retinal adaptation to visual motion, such as by oscillating around a fixation point, appeared to help sustain the sensitivity to retinal motion stimulation caused by optic flow, which generated stronger overall vection 12 – 14 . Eye-movements also affect retinal motion and displacement of the focus of expansion, which in turn, can enhance the overall strength of vection 15 – 19 .…”

Section: Introductionmentioning

confidence: 99%

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Effects of stereopsis on vection, presence and cybersickness in head-mounted display (HMD) virtual reality

Luu

Zangerl

Kalloniatis

et al. 2021

Sci Rep

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Stereopsis provides critical information for the spatial visual perception of object form and motion. We used virtual reality as a tool to understand the role of global stereopsis in the visual perception of self-motion and spatial presence using virtual environments experienced through head-mounted displays (HMDs). Participants viewed radially expanding optic flow simulating different speeds of self-motion in depth, which generated the illusion of self-motion in depth (i.e., linear vection). Displays were viewed with the head either stationary (passive radial flow) or laterally swaying to the beat of a metronome (active conditions). Multisensory conflict was imposed in active conditions by presenting displays that either: (i) compensated for head movement (active compensation condition), or (ii) presented pure radial flow with no compensation during head movement (active no compensation condition). In Experiment 1, impairing stereopsis by anisometropic suppression in healthy participants generated declines in reported vection strength, spatial presence and severity of cybersickness. In Experiment 2, vection and presence ratings were compared between participants with and without clinically-defined global stereopsis. Participants without global stereopsis generated impaired vection and presence similarly to those found in Experiment 1 by subjects with induced stereopsis impairment. We find that reducing global stereopsis can have benefits of reducing cybersickness, but has adverse effects on aspects of self-motion perception in HMD VR.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of stereopsis on vection, presence and cybersickness in head-mounted display (HMD) virtual reality

Luu

Zangerl

Kalloniatis

et al. 2021

Sci Rep

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“…In fact, this is a plausible idea, as human visual motion perception is primarily based on the optical flow, as first discovered by Gibson [21] and further confirmed in brain science research [22], [23]. In follow-up studies, methods have been devised to modulate the degree or characteristics of vection by manipulating the optical flow form [24], overlapping different directional/rotation flows [25], and mixing in visual noise [26]. In fact, the human brain can differentiate between the visual motion caused by oneself and those caused by objects in the visual field, particularly when facilitated by the vestibular sense [27].…”

Section: Mcgill Et Al Investigated the Effects Of Visual Motion Cues ...mentioning

confidence: 92%

RideVR: Reducing Sickness for In-Car Virtual Reality by Mixed-in Presentation of Motion Flow Information

Cho

Kim.

2022

IEEE Access

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Humans spend a significant portion of their daily life in cars. In this study, we investigate a method to reduce motion sickness and allow people to use virtual reality (VR) while riding in cars. As the sickness arises primarily from the sensory conflict between visual and actual (or vestibular) motions, the proposed approach attempts to resolve the mismatch by mixing in and visualizing the estimated information of the actual motion, which is sensed by the on-board diagnostics and inertial measurement unit modules attached to the vehicle. We conduct a pilot experiment to validate our approach by comparing the sickness levels before and after implementing the approach in three in-car VR usage conditions:(1) Default -using the VR content without modification; (2) transparent wall -using the VR content with its background scene changing depending on the car motion; (3) particle flow -mixing in the VR content with the estimated motion flow of the car visualized as moving particles. Our experimental results show that motion sickness is reduced significantly (but not eliminated to a negligible level) using our approach.

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“…In both the abstract and the naturalistic condition, a focus marker was used. Focus markers are commonly used in vection research (e.g., [40], [41]) and was included in our study for the comparison between conditions with and without a secondary task (see [34] for results).…”

Section: Designmentioning

confidence: 99%

A Virtual Reality Study Investigating the Effect of Cybersickness on the Relationship Between Vection and Presence Across Environments with Varying Levels of Ecological Relevance

Kooijman

Asadi

Mohamed

et al. 2022

2022 15th International Conference on Human System Interaction (HSI)

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In the absence of physical motion, people sometimes experience the illusory sensation of self-motion which is known as vection. Vection and presence are positively related and vection research could contribute to the improvement of the fidelity of motion simulators. However, when utilizing Virtual Reality technology for motion simulators, visually-induced motion sickness (VIMS) in the form of Cybersickness (CS) sometimes co-occurs when one experiences vection. However, the relationship between vection and CS is not evident as, to the best of our knowledge, past research mainly investigated the relationship between the vection and CS with environments with a certain level of ecological relevance. Herein we aimed to investigate whether CS negatively affects the relationship between vection and presence across different virtual environments with varying levels of ecological relevance. We immersed twenty-nine participants visually and audibly in virtual environments and after each trial, participants reported their vection intensity, CS and presence. Our results showed that the relationship between vection intensity and presence was unaffected by CS. We conclude that the relationship between vection and presence is unaffected by CS with low levels of discomfort.

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The Effect of Optical Flow Motion Direction on Vection Strength

Cited by 21 publications

References 49 publications

Effects of stereopsis on vection, presence and cybersickness in head-mounted display (HMD) virtual reality

Effects of stereopsis on vection, presence and cybersickness in head-mounted display (HMD) virtual reality

RideVR: Reducing Sickness for In-Car Virtual Reality by Mixed-in Presentation of Motion Flow Information

A Virtual Reality Study Investigating the Effect of Cybersickness on the Relationship Between Vection and Presence Across Environments with Varying Levels of Ecological Relevance

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