Temporal integration of random dot apparent motion information in human central vision.

abstract：:A large number of studies, using a wide variety of experimental techniques, have investigated the "higher-order" color mechanisms proposed by Krauskopf and colleagues in 1986. Results reviewed here come from studies of chromatic discrimination at threshold, habituation, classification images, spatial alignment and ori...

journal_title：Vision research

authors： Eskew RT Jr

更新日期：2009-11-01 00:00:00

abstract：:The processing of a visual stimulus is known to be influenced by the statistics in recent visual history and by the stimulus' visual surround. Such contextual influences lead to perceptually salient phenomena, such as the tilt aftereffect and the tilt illusion. Despite much research on the influence of an isolated con...

journal_title：Vision research

authors： Dekel R,Sagi D

更新日期：2020-04-01 00:00:00

abstract：:Rapid texture segregation is examined using filtered noise textures. The stimuli consist of a foreground region of filtered noise with one dominant texture orientation against a background region with a different dominant orientation. Shape discrimination of the foreground region is measured as a function of the diffe...

journal_title：Vision research

authors： Landy MS,Bergen JR

更新日期：1991-01-01 00:00:00

abstract：:Neurons involved in the transfer of rod signals to the ganglion cells in the retina of the cat have been recorded from and stained with horseradish peroxidase (HRP) and their synaptic connections determined by electron microscopy. The single morphological type of rod bipolar cell responds with a sustained hyperpolariz...

journal_title：Vision research

authors： Kolb H,Nelson R

更新日期：1983-01-01 00:00:00

abstract：:An outline drawing often serves as an excellent depiction of a visual scene. Somehow, our visual system can form two- and three-dimensional percepts solely from one-dimensional contour information. In mathematics, contour closure plays a key role in bridging this dimensional gap, however in perception the link between...

journal_title：Vision research

authors： Elder J,Zucker S

更新日期：1993-05-01 00:00:00

abstract：:To test whether first- and second-order stimuli are processed independently in amblyopic vision, we measured thresholds for identifying a target letter flanked by two letters for all combinations of first- and second-order targets and flankers. We found that (1) the magnitude of crowding is greater for second- than fo...

journal_title：Vision research

authors： Chung ST,Li RW,Levi DM

更新日期：2008-03-01 00:00:00

abstract：:Texture information about surface shape can be decomposed into three constituents: compression, density and scaling. Blake, Bülthoff and Sheinberg's (1993, Vision Research, 33, 1723-1737) Ideal Observer theory of slant from texture predicts that the relative contribution of compression and density to the percept of pl...

journal_title：Vision research

authors： Buckley D,Frisby JP,Blake A

更新日期：1996-04-01 00:00:00

abstract：:We consider how local motion signals are combined to represent the movements of spatially extensive objects. A series of band-pass target dots, whose collective motion defined a moving contour, was positioned within a field of randomly moving noise dots. The visibility of the contours did not depend on the direction o...

journal_title：Vision research

authors： Bex PJ,Simmers AJ,Dakin SC

更新日期：2003-09-01 00:00:00

abstract：:Humans use smooth pursuit eye movements to track moving objects of interest. In order to track an object accurately, motion signals from the target have to be integrated and segmented from motion signals in the visual context. Most studies on pursuit eye movements used small visual targets against a featureless backgr...

journal_title：Vision research

authors： Debono K,Schütz AC,Spering M,Gegenfurtner KR

更新日期：2010-12-01 00:00:00

abstract：:The apparent motion of a discretely displaced complex waveform with a periodic contrast modulation or "beat" of frequency f and sinusoidal components of frequencies 3f and 4f was examined at various interstimulus intervals (ISIs). At short ISIs perception of motion of both the beat and an aliased component of the wave...

journal_title：Vision research

authors： Hammett ST,Ledgeway T,Smith AT

更新日期：1993-05-01 00:00:00

abstract：:The steady-state, monocular, accommodation response to sinusoidal grating targets (spatial frequencies 0.67, 2.0, 6.0 and 18 c/deg) at effective distances between 0.2 and 1.0 m was measured with a laser optometer, as a function of the grating modulation. In general, only a rather weak dependence of the response on mod...

journal_title：Vision research

authors： Tucker J,Charman WN,Ward PA

更新日期：1986-01-01 00:00:00

abstract：:Perception of visual motion includes a first-order mechanism sensitive to luminance changes and a second-order motion mechanism sensitive to contrast changes. We studied neural substrates for these motion types in 142 subjects with visual cortex lesions, 68 normal controls and 28 brain lesion controls. On first-order ...

journal_title：Vision research

authors： Rizzo M,Nawrot M,Sparks J,Dawson J

更新日期：2008-11-01 00:00:00

abstract：:How we attend to and search for objects in the real world is influenced by a host of low-level and higher-level factors whose interactions are poorly understood. The vast majority of studies approach this issue by experimentally controlling one or two factors in isolation, often under conditions with limited ecologica...

journal_title：Vision research

authors： Kovach CK,Adolphs R

更新日期：2015-11-01 00:00:00

abstract：:Reach and grasp movements are a fundamental part of our daily interactions with the environment. This spatially-guided behavior is often directed to memorized objects because of intervening eye movements that caused them to disappear from sight. How does the brain store and maintain the spatial representations of obje...

journal_title：Vision research

authors： Selen LP,Medendorp WP

更新日期：2011-04-22 00:00:00

abstract：:In a texture-segregation paradigm, subjects were asked to detect figures whose elements were segregated from background either because of temporal offset or because of differing orientations. Texture elements were either isoluminant or had high or low luminance contrast. At high luminance contrast, figures could be se...

journal_title：Vision research

authors： Leonards U,Singer W

更新日期：1998-01-01 00:00:00

abstract：:Saleh and Bonnet [Fechner Day 98, p. 344] have shown that, upon parafoveal stimulation and up to 6.5 c/deg, reaction time (RT) is a function of grating contrast multiplied by grating period. The present experiments extend these findings to foveal stimulation within a wider spatial-frequency (SF) range and to stimuli o...

journal_title：Vision research

authors： Vassilev A,Mihaylova M,Bonnet C

更新日期：2002-03-01 00:00:00

abstract：:Wilson and Humanski (1993) have recently reported evidence that adapting to low temporal frequency sinewave gratings yields little threshold elevation for briefly presented test stimuli. We postulated that brief stimuli may be detected by a transient channel which would be minimally affected by a low temporal frequenc...

journal_title：Vision research

authors： Hammett ST,Snowden RJ

更新日期：1995-06-01 00:00:00

abstract：:In a rapid categorisation task, monkeys and humans had to detect a target (animal or food) in briefly flashed (32 ms) and previously unseen natural images. Removing colour cues had very little effect on average performance. Impairments were restricted to a mild accuracy drop (in some human subjects) and a small reacti...

journal_title：Vision research

authors： Delorme A,Richard G,Fabre-Thorpe M

更新日期：2000-01-01 00:00:00

abstract：:A smooth surface imaged on the retina produces a smooth flow field. Thus, the visual system may group regions of smoothly varying flow to segment surfaces. We tested this idea by having observers perform a segmentation task on several stimuli that differed in their 3D interpretations but were all matched in the smooth...

journal_title：Vision research

authors： Bravo MJ,Farid H

更新日期：2000-01-01 00:00:00

abstract：:The apparent speed of plaids made up of two gratings having the same spatial frequency and the same speed was evaluated (symmetrical type I). The plaids were moving vertically as defined by the intersection-of-constraints (IOC) rule with a mean duration of 300 msec. The comparison-stimulus was a horizontal line moving...

journal_title：Vision research

authors： Castet E,Morgan MJ

更新日期：1996-01-01 00:00:00

abstract：:The problem of perceptual organization was studied by Gestalt psychologists in terms of figure-ground segregation. In this paper we explore a new principle of figure-ground segregation: accentuation. We demonstrate the effectiveness of accentuation relative to other Gestalt principles, and also consider it autonomous ...

journal_title：Vision research

authors： Pinna B,Reeves A,Koenderink J,van Doorn A,Deiana K

更新日期：2018-02-01 00:00:00

abstract：:The present paper reports results of a dual task study in which two locations were endogenously cued as possible target locations, while only one eye movement had to be executed. During the cue period, letters were briefly presented at the saccade goals and at no-saccade goals. Results show that performance was better...

journal_title：Vision research

authors： Van der Stigchel S,Theeuwes J

更新日期：2005-07-01 00:00:00

abstract：:In research on eye-movement control during reading, the importance of cognitive processes related to language comprehension relative to visuomotor aspects of saccade generation is the topic of an ongoing debate. Here we investigate various eye-movement measures during reading of randomly shuffled meaningless text as c...

journal_title：Vision research

authors： Schad DJ,Nuthmann A,Engbert R

更新日期：2010-11-23 00:00:00

abstract：:A long-wavelength background can affect the appearance of an increment of light superimposed upon it in two ways. It can change the visual system's sensitivity to the increment, and it can change the appearance of the increment by directly adding redness to it. Through selective retinal-image stabilization, we evoked ...

journal_title：Vision research

authors： Nerger JL,Piantanida TP,Larimer J

更新日期：1993-01-01 00:00:00

abstract：:A visual transient due to a sudden visual change is generally considered to draw our attention to a location of interest. In a series of experiments we investigated how visual transients facilitate change detection in a scene. In line with earlier reports, we found that a transient sensation has its roots in a tempora...

journal_title：Vision research

authors： Kanai R,Verstraten FA

更新日期：2004-01-01 00:00:00

abstract：:Two experiments are reported in which observers judged the sign and magnitude of surface curvature from shaded images of an indoor scene. The depicted surfaces were illuminated by an area light in the ceiling or floor, and the illumination was attenuated with distance in a physically correct manner. The displays were ...

journal_title：Vision research

authors： Liu B,Todd JT

更新日期：2004-01-01 00:00:00

abstract：:We report a series of nine experiments which show that a single roll-tilted line in darkness induces changes of the orientation perceived as vertical (VPV) that are similar in magnitude and direction to those measured by Witkin and Asch (1948a) [Studies in space orientation. I. Perception of the upright with displaced...

journal_title：Vision research

authors： Li W,Matin L

更新日期：2005-07-01 00:00:00

abstract：:The perceived and remembered position of stationary target objects is subject to a large number of distortions. Objects are localized toward the fovea, and when an additional object (distractor) is presented, a tendency to average target and distractor position was observed. These distortions in visual short-term memo...

journal_title：Vision research

authors： Kerzel D

更新日期：2002-01-01 00:00:00

abstract：:The present study provides new clues about visual processes underlying the human pupillary responses evoked by achromatic spatial patterns. The pupillary responses can be modeled as a combination of two processes, a temporally transient process which saturates with increasing contrast and a temporally sustained proces...

journal_title：Vision research

authors： Young RS,Kennish J

更新日期：1993-11-01 00:00:00

abstract：:It is commonly believed that objects viewed in certain contexts may be more or less salient. Measurements of salience have usually relied on asking observers "How much does this object stand out against the background?". In this study, we measured the salience of objects by assessing the distraction they produce for s...

journal_title：Vision research

authors： Huang L,Pashler H

更新日期：2005-06-01 00:00:00