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Articles on Psychophysics
Redirecting walking and driving for natural navigation in immersive virtual environments.
We tend to support walking with passive or active transportation for longer-distance travel. In this article we show that concepts from the field of redirected walking can be applied to movements with transportation devices. We conducted psychophysical experiments to determine perceptual detection t...
Spatio-temporal templates of transient attention revealed by classification images.
We have measured the spatio-temporal perceptive fields for transiently cued signals at various eccentricities using the classification images (CI) technique. At near eccentricities transient attention caused the perceptual templates to be sharper in space and characterized by much stronger high spat...
Inferotemporal cortex subserves three-dimensional structure categorization.
We perceive real-world objects as three-dimensional (3D), yet it is unknown which brain area underlies our ability to perceive objects in this way. The macaque inferotemporal (IT) cortex contains neurons that respond selectively to 3D structures defined by binocular disparity. To examine the causal...
Evidence for impaired neocortical synaptic plasticity in bipolar II disorder.
We examined VEP plasticity in healthy control subjects and patients with bipolar II disorder (BD-II). Forty healthy control subjects and 26 individuals with a DSM-IV diagnosis of BD-II matched for age and gender participated. The VEPs were evoked by checkerboard reversal stimulation...
Vibrotactile difference thresholds: effects of vibration frequency, vibration magnitude, contact area, and body location.
I (NPI) channel and the Pacinian (P) channel would differ. Using two different contactors (1-mm diameter contactor with 1-mm gap to a fixed surround; 10-mm diameter contactor with 2-mm gap to the surround) vibration was applied to the thenar eminence and the volar forearm at two frequencies (10 and...
Psychophysical evaluation of achromatic and chromatic vision of workers chronically exposed to organic solvents.
The purpose of this paper was to evaluate achromatic and chromatic vision of workers chronically exposed to organic solvents through psychophysical methods. Thirty-one gas station workers (31.5 ± 8.4 years old) were evaluated. Psychophysical tests were achromatic tests (Snellen char...
Extended Stevens' power law.
An extension of the Stevens' power law, widely used in psychophysics to relate a physical magnitude of a stimulus (e.g. taste, luminance, weight, sound pressure) with the corresponding experienced magnitude (saltiness, brightness, heaviness, loudness etc.) has been proposed. It takes...
Attention and visual memory in visualization and computer graphics.
We "see" details in an image can directly impact a viewer’s efficiency and effectiveness. This article surveys research on attention and visual perception, with a specific focus on results that have direct relevance to visualization and visual analytics. We discuss theories of low-level visual...
Natural perspective projections for head-mounted displays.
We analyze the user's perception of a VE displayed in a HMD, which is rendered with different GFOVs. We introduce a psychophysical calibration method to determine the HMD's actual field of view, which may vary from the nominal values specified by the manufacturer. Furthermore, we conducted two exper...
Motion psychophysics: 1985-2010.
This review traces progress made in the field of visual motion research from 1985 through to 2010. While it is certainly not exhaustive, it attempts to cover most of the major achievements during that period, and speculate on where the field is heading. Copyright © 2...