Visual perception and perceptual processing in real and virtual environments: Proceedings of the Second Joint Seminar between Japan and Switzerland at Nara

2005 ◽  
Vol 47 (3) ◽  
pp. 151-155
Author(s):  
KAZUO KOGA ◽  
RUDOLF GRONER ◽  
KEIICHIRO TSUJI
Keyword(s):  
Visual Perception ◽  
Virtual Environments ◽  
Perceptual Processing ◽  
Joint Seminar

Visual Perception and Perceptual Processing in Real and Virtual Environments

2004 ◽  
Vol 63 (3) ◽  
pp. 139-142 ◽  
Author(s):  
Rudolf Groner ◽  
Kazuo Koga ◽  
Keiichiro Tsuji
Keyword(s):  
Visual Perception ◽  
New Media ◽  
Virtual Environments ◽  
Technological Progress ◽  
Applied Research ◽  
New Technologies ◽  
Psychological Research ◽  
Perceptual Processing ◽  
Japanese Psychological Research ◽  
Swiss Journal

We present a brief outline of the development of research in visual perception with the advent of new technologies up to New Media and virtual environments. There is a mutual inspiration and benefiting between fundamental and applied research and technological progress which should be utilized by the disciplines involved. Next, an overview of a conference, held in Nara (Japan) September 2001, is given of which different selections of articles are presented in the current special issues of the Swiss Journal of Psychology and of Japanese Psychological Research.

scholarly journals Pseudo-haptic feedback in medical teleoperation

2015 ◽  
Vol 1 (1) ◽  
pp. 160-163 ◽  
Author(s):  
Carsten Neupert ◽  
Sebastian Matich ◽  
Peter P. Pott ◽  
Christian Hatzfeld ◽  
Roland Werthschützky
Keyword(s):  
User Interface ◽  
Visual Perception ◽  
Virtual Environments ◽  
Mechanical Characteristic ◽  
Haptic Feedback ◽  
Surgical Robot ◽  
Interaction Forces ◽  
End Effector ◽  
Grasping Force ◽  
Coupling Characteristic

AbstractPseudo-haptic feedback is a haptic illusion based on a mismatch of haptic and visual perception. It is well known from applications in virtual environments. In this work, we discuss the usabiliy of the principle of pseudo-haptic feedback for teleoperation. Using pseudo-haptic feedback can ease the design of haptic medical tele-operation systems.Thereby a user’s grasping force at an isometric user interface is used to control the closing angle of an end effector of a surgical robot. To provide a realistic haptic feedback, the coupling characteristic of grasping force and end effector closing angle is changed depending on acting end effector interaction forces.With an experiment, we show the usability of pseudo-haptic feedback for discriminating compliances, comparable to the mechanical characteristic of muscles relaxed and contracted. The provided results base upon the data of 10 subjects, and 300 trails.

scholarly journals Seeing in Slow Motion: Manipulating Arousal in Virtual Reality

2019 ◽  
Vol 63 (1) ◽  
pp. 1649-1653
Author(s):  
Michael Wilkinson ◽  
Zachary H. Pugh ◽  
Aaron Crowson ◽  
Jing Feng ◽  
Christopher B. Mayhorn ◽  
...  
Keyword(s):  
Heart Rate ◽  
Virtual Reality ◽  
Visual Perception ◽  
Implicit Memory ◽  
Memory Task ◽  
Slow Motion ◽  
Physiological Arousal ◽  
Perceptual Processing ◽  
Ongoing Debate ◽  
Performance Gains

The only evidence that seeing in slow-motion exists comes from retrospective interviews. An ongoing debate is whether this phenomenon exists as a figment of memory or a true function of visual perception. Testing these speculations is difficult given slow-motion experience is often associated with intense, stressful, and even threatening situations that dramatically heighten arousal. Virtual reality systems might provide an opportunity to study the experience online, thus offering insights into the speculated mechanisms. This study explores the feasibility to induce heightened arousal and its possible implications on perceptual encoding of information. Participants were exposed to various situations designed to influence arousal as measured by heart rate, and an implicit memory task was used for each situation to test perceptual processing. This study did not reveal performance gains associated with increased physiological arousal.

scholarly journals Mind the Depth: Visual Perception of Shapes Is Better in Peripersonal Space

2018 ◽  
Vol 29 (11) ◽  
pp. 1868-1877 ◽  
Author(s):  
Elvio Blini ◽  
Clément Desoche ◽  
Romeo Salemme ◽  
Alexandre Kabil ◽  
Fadila Hadj-Bouziane ◽  
...  
Keyword(s):  
Visual Perception ◽  
Virtual Environments ◽  
Human Perception ◽  
Peripersonal Space ◽  
Visual Illusions ◽  
Shape Discrimination ◽  
Daily Experience ◽  
Future Studies ◽  
Immersive Virtual Environments ◽  
Perceptual Abilities

Closer objects are invariably perceived as bigger than farther ones and are therefore easier to detect and discriminate. This is so deeply grounded in our daily experience that no question has been raised as to whether the advantage for near objects depends on other features (e.g., depth itself). In a series of five experiments ( N = 114), we exploited immersive virtual environments and visual illusions (i.e., Ponzo) to probe humans’ perceptual abilities in depth and, specifically, in the space closely surrounding our body, termed peripersonal space. We reversed the natural distance scaling of size in favor of the farther object, which thus appeared bigger, to demonstrate a persistent shape-discrimination advantage for close objects. Psychophysical modeling further suggested a sigmoidal trend for this benefit, mirroring that found for multisensory estimates of peripersonal space. We argue that depth is a fundamental, yet overlooked, dimension of human perception and that future studies in vision and perception should be depth aware.

scholarly journals Differential temporal dynamics during visual imagery and perception

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Nadine Dijkstra ◽  
Pim Mostert ◽  
Floris P de Lange ◽  
Sander Bosch ◽  
Marcel AJ van Gerven
Keyword(s):  
Visual Cortex ◽  
Visual Perception ◽  
Visual Imagery ◽  
Temporal Dynamics ◽  
Stimulus Onset ◽  
Neural Mechanisms ◽  
Perceptual Processing ◽  
Time Points ◽  
Perceptual Representations ◽  
Human Participants

Visual perception and imagery rely on similar representations in the visual cortex. During perception, visual activity is characterized by distinct processing stages, but the temporal dynamics underlying imagery remain unclear. Here, we investigated the dynamics of visual imagery in human participants using magnetoencephalography. Firstly, we show that, compared to perception, imagery decoding becomes significant later and representations at the start of imagery already overlap with later time points. This suggests that during imagery, the entire visual representation is activated at once or that there are large differences in the timing of imagery between trials. Secondly, we found consistent overlap between imagery and perceptual processing around 160 ms and from 300 ms after stimulus onset. This indicates that the N170 gets reactivated during imagery and that imagery does not rely on early perceptual representations. Together, these results provide important insights for our understanding of the neural mechanisms of visual imagery.

scholarly journals Ambient sounds can enhance visual perception and memory performance in virtual environments

2010 ◽  
Vol 6 (6) ◽  
pp. 170-170 ◽  
Author(s):  
E. T. Davis ◽  
K. Scott ◽  
K. W. Hailston ◽  
J. Pair ◽  
L. Hodges
Keyword(s):  
Visual Perception ◽  
Virtual Environments ◽  
Memory Performance

Visual Exploratory Activity of Hemiplegic Patients Viewing the Motor-Free Visual Perception Test

1983 ◽  
Vol 57 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Paul J. Locher ◽  
Deborah Lee Bigelow
Keyword(s):  
Eye Movements ◽  
Visual Perception ◽  
Clinical Manifestations ◽  
Exploratory Activity ◽  
Adult Brain ◽  
Perceptual Processing ◽  
Visual Exploration ◽  
Left Brain ◽  
Processing Abilities ◽  
Scanning Strategies

Eye movements of adult hemiplegics (11 right- and 9 left-brain-damaged patients) and 11 nonimpaired controls were recorded as they viewed selected cards of the Motor-free Visual Perception Test. The major finding was that neither group of patients exhibited an asymmetry of visual exploration (unilateral visual neglect) as they viewed the cards. Their scanning strategies were, however, unsystematic and irregular. In addition, both groups of patients scanned the cards longer and made more errors than controls. Use of the Motor-free Visual Perception Test as an appropriate measure for the general assessment of visual-perceptual processing abilities of adult brain-damaged patients who lack severe clinical manifestations of neglect is discussed.

Sign in / Sign up

Export Citation Format

Share Document