Subjective visual vertical assessment with mobile virtual reality system

Ulozienė, Ingrida; Totilienė, Milda; Paulauskas, Andrius; Blažauskas, Tomas; Marozas, Vaidotas; Kaski, Diego; Ulozas, Virgilijus

doi:10.1016/j.medici.2018.02.002

Cited by 25 publications

(18 citation statements)

References 29 publications

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“…The System Usability Scale (SUS) [42] is an instrument that allows usability practitioners and researchers to measure the subjective usability of products and services. In the VR domain, SUS has been utilised in several studies around such topics as VR rehabilitation and health services [54][55][56][57][58], VR learning [59], and VR training [60]. SUS is a ten-item questionnaire that can be administered quickly and easily, and it returns scores ranging from 0 to 100.…”

Section: Questionnaires Andmentioning

confidence: 99%

VR Locomotion in the New Era of Virtual Reality: An Empirical Comparison of Prevalent Techniques

Boletsis

Cedergren

2019

Advances in Human-Computer Interaction

139

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The latest technical and interaction advancements within the virtual reality (VR) field have marked a new era, not only for VR, but also for VR locomotion. In this era, well-established, prevalent VR locomotion techniques are mostly used as points of comparison for benchmarking of new VR locomotion designs. At the same time, there is the need for more exploratory, comparative studies of contemporary VR locomotion techniques, so that their distinguished interaction aspects can be documented and guide the design process of new techniques. This article presents a comparative, empirical evaluation study of contemporary and prevalent VR locomotion techniques, examining the user experience (UX) they offer. First, the prevalent VR locomotion techniques are identified based on literature, i.e., walking-in-place, controller/joystick, and teleportation. Twenty-six adults are enrolled in the study and perform a game-like task using the techniques. The study follows a mixed methods approach, utilising the System Usability Scale survey, the Game Experience Questionnaire, and a semistructured interview to assess user experiences. Results indicate that the walking-in-place technique offers the highest immersion but also presents high levels of psychophysical discomfort. Controller/joystick VR locomotion is perceived as easy-to-use due to the users’ familiarity with controllers, whereas teleportation is considered to be effective due to its fast navigation, although its visual ‘jumps’ do break the users’ sense of immersion. Based on the interviews, the users focused on the following interaction dimensions to describe their VR locomotion experiences: (i) immersion and flow, (ii) ease-of-use and mastering, (iii) competence and sense of effectiveness, and (iv) psychophysical discomfort. The study implications for VR locomotion are discussed, along with the study limitations and the future direction for research.

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Section: Questionnaires Andmentioning

confidence: 99%

VR Locomotion in the New Era of Virtual Reality: An Empirical Comparison of Prevalent Techniques

Boletsis

Cedergren

2019

Advances in Human-Computer Interaction

139

View full text Add to dashboard Cite

show abstract

“…SUS is an instrument that allows usability practitioners and researchers to measure the subjective usability of products and services. In the VR domain, SUS has been utilised in several studies around such topics as VR text input [23], VR rehabilitation and health services [32][33][34][35][36], VR learning [37] and VR training [38]. Specifically, it is a ten-item questionnaire that can be administered quickly and easily, and it returns scores ranging from 0-100.…”

Section: Demographics and Questionnairesmentioning

confidence: 99%

Text Input in Virtual Reality: A Preliminary Evaluation of the Drum-Like VR Keyboard

Boletsis

Kongsvik

2019

Technologies

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The drum-like virtual reality (VR) keyboard is a contemporary, controller-based interface for text input in VR that uses a drum set metaphor. The controllers are used as sticks which, through downward movements, “press” the keys of the virtual keyboard. In this work, a preliminary feasibility study of the drum-like VR keyboard is described, focusing on the text entry rate and accuracy as well as its usability and the user experience it offers. Seventeen participants evaluated the drum-like VR keyboard by having a typing session and completing a usability and a user experience questionnaire. The interface achieved a good usability score, positive experiential feedback around its entertaining and immersive qualities, a satisfying text entry rate (24.61 words-per-minute), as well as moderate-to-high total error rate (7.2%) that can probably be further improved in future studies. The work provides strong indications that the drum-like VR keyboard can be an effective and entertaining way to type in VR.

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“…1,2,8,9 Sensitive measurement techniques have been required to evaluate the central and peripheral vestibular system function in patients with neurological disorders. 5,10 On the other hand, many studies reported that an evaluation of the balance function and visual system could be used to evaluate the vestibular function, even when a direct evaluation of the vestibular system was not included. [11][12][13][14] The subjective visual vertical (SVV) is a tool for evaluating the function of the utricle in the inner ear and aims to assess the perception of verticality or abnormally tilted visual sensation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

Kwon

Yeo

2020

J Kor Phys Ther

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The subjective visual vertical (SVV) test is used to evaluate the otolith function in the inner ear. This study compared the different balance ability according to the results of the SVV in healthy adults. Methods: This study recruited 30 normal healthy subjects who did not have neurological and musculoskeletal disorders. The subjects were divided into experimental and control groups based on the results of SVV: experimental group, > 2°; control group, < 2°. The static balance ability was evaluated using the Fourier Index, which could evaluate the balance capacity objectively and quantitatively. Results: The mean angle of the SVV in the experimental and control groups was 4.44° and 0.59°, respectively. In the result of the Fourier series, the F1 frequency band in the experimental group showed a significantly higher value under one condition compared to the control group (p< 0.05). In the F2-4 and F5-6 frequency bands, the experimental group showed a significant increase in the Fourier series value under the four conditions compared to the control group (p< 0.05). In the F7-8 frequency band, significantly higher values of the Fourier series were observed in the experimental group under the three different conditions (p< 0.05). Conclusion: These results showed increased trunk sway while maintaining static balance in the experimental group who showed a larger SVV angle compared to the control group. The SVV can be applied to evaluate the vestibular system and balance ability in normal adults.

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Subjective visual vertical assessment with mobile virtual reality system

Cited by 25 publications

References 29 publications

VR Locomotion in the New Era of Virtual Reality: An Empirical Comparison of Prevalent Techniques

VR Locomotion in the New Era of Virtual Reality: An Empirical Comparison of Prevalent Techniques

Text Input in Virtual Reality: A Preliminary Evaluation of the Drum-Like VR Keyboard

Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

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