Transient and sustained components of the pupil response evoked by achromatic spatial patterns.

abstract：:The characteristics of the neural generator producing an evoked potential in response to the brief presentation of a vernier offset was investigated in three experiments. In the first study, averaged evoked potentials (EPs) recorded in response to a single vernier offset stimulus consisting of a horizontal line which ...

journal_title：Vision research

authors： Zak R,Berkley MA

更新日期：1986-01-01 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 pincushion formed by four arcs on a gray background looks darker when the arcs are black, and lighter when the arcs are white. Yet, a matching-experiment shows that this difference is relative. Whereas the apparently darker pincushion requires a matching luminance that is lower than the background luminance (i.e. as...

journal_title：Vision research

authors： De Weert CM,Spillmann L

更新日期：1995-05-01 00:00:00

abstract：:One of the most fundamental functions of the visual system is to code the positions of objects. Most studies, especially those using fMRI, widely assume that the location of the peak retinotopic activity generated in the visual cortex by an object is the position assigned to that object-this is a simplified version of...

journal_title：Vision research

authors： Whitney D,Bressler DW

更新日期：2007-01-01 00:00:00

abstract：:Existing models for the generation of saccades predict fixed trajectories between start and landing positions of saccades. Experimental data show that saccades have rather variable trajectories. The objective of the present research is to quantify the variability in trajectories of binocular saccades and to test in ho...

journal_title：Vision research

authors： Erkelens AJ,Sloot OB

更新日期：1995-12-01 00:00:00

abstract：:Adaptation to the simple visual displacement of prisms was compared to that for refractive lenses, which have a varied prismatic effect. Subjects were made myopic using contact lenses, then corrected using spectacle lenses. The effect on the perceived direction of a randomly located target was assessed from pointing b...

journal_title：Vision research

authors： Tuan KM,Jones R

更新日期：1997-07-01 00:00:00

abstract：:Extensive research on local color aftereffects has revealed perceptual consequences of opponent color coding in the retina and the LGN, and of orientation-and/or spatial-frequency-contingent color coding in early cortical visual areas (e.g., V1 and V2). Here, we report a color aftereffect that depends crucially on glo...

journal_title：Vision research

authors： Goolsby BA,Grabowecky M,Suzuki S

更新日期：2005-03-01 00:00:00

abstract：:We examined the ability of human observers to detect three kinds of statistical structure in binary arrays: first-order statistics (luminance), local fourth-order statistics (isodipole textures), and long-range statistics (bilateral symmetry). Performance was closest to ideal on the luminance task and furthest from id...

journal_title：Vision research

authors： Victor JD,Conte MM

更新日期：2005-04-01 00:00:00

abstract：:In this review we discuss evidence from psychophysical, electrophysiological, and neuroimaging studies that demonstrates the updating of remembered visual space in a reference frame that is centred on the eye. We then extend these findings by discussing recent work from our lab. Specifically, we address eye-centred up...

journal_title：Vision research

authors： Thompson AA,Henriques DY

更新日期：2011-04-22 00:00:00

abstract：:Subjects observed a random dot pattern that moved horizontally with modulated velocity within an invisible aperture. The velocity contrast, (V2-V1)/V1, was 2/3. Two different percepts occurred while observing this stimulus. At lower modulation frequencies, between 2 and 12 Hz, velocity changes were clearly seen; this ...

journal_title：Vision research

authors： Mateeff S,Hohnsbein J

更新日期：1996-09-01 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：:The visual cycle system in a primitive chordate, ascidian Ciona intestinalis, was studied by whole-mount in situ hybridization and by whole-mount immunohistochemistry. Three visual cycle proteins, Ciona homologue of RGR (Ci-opsin3), CRALBP (Ci-CRALBP), and BCO/RPE65 (Ci-BCO/RPE65) were widely distributed in the brain ...

journal_title：Vision research

authors： Tsuda M,Kusakabe T,Iwamoto H,Horie T,Nakashima Y,Nakagawa M,Okunou K

更新日期：2003-12-01 00:00:00

abstract：:Researchers have investigated whether attentional capture during visual search is driven by top-down processes, i.e. experimental goals and directives, or by bottom-up processes, i.e. the properties of the items within a search display. Some research has demonstrated that subjects cannot avoid attending to a task-irre...

journal_title：Vision research

authors： Berry JH

更新日期：2013-03-22 00:00:00

abstract：:Psychophysical measures of hue (wavelength) discrimination and spectral sensitivity were collected over a 3-year-period on a rhesus monkey whose right eye had been exposed to intense blue light 10 years prior and had shown a pronounced loss of blue sensitivity in an increment-threshold, spectral-sensitivity task. Hue ...

journal_title：Vision research

authors： Wright AA,Sperling HG,Mills SL

更新日期：1987-01-01 00:00:00

abstract：:The flash-lag effect (FLE) is defined as an error in localization that consists of perceiving a flashed object to lag behind a moving one when both are presented in physical alignment. Previous studies have addressed the question if it is the predictability of the flash, or the moving object, that modulates the amount...

journal_title：Vision research

authors： López-Moliner J,Linares D

更新日期：2006-06-01 00:00:00

abstract：:We have used the minimum-motion stimulus of Cavanagh, MacLeod & Anstis [(1987) Journal of the Optical Society of America A, 4, 1428-1438] to examine how signals along different directions in color space interact in motion perception. Stimuli were pairs of counterphasing gratings combined 90 deg out of phase in both sp...

journal_title：Vision research

authors： Webster MA,Mollon JD

更新日期：1997-06-01 00:00:00

abstract：:It has been proposed that there is a perceptual compensation for the difference between the speeds of light and sound. We examined this possibility using a range of auditory-visual tasks, in which performance depends on the relative timing of auditory and visual information, and manipulated viewing distance to test fo...

journal_title：Vision research

authors： Arnold DH,Johnston A,Nishida S

更新日期：2005-05-01 00:00:00

abstract：:To gain new insight into the effects of monocular deprivation, we studied the visual cortex of adult cats deprived of vision in one eye. Local field potentials were recorded in response to contrast reversal of square-wave gratings modulated in time either by pseudorandom, m-sequences or periodically. We have found tha...

journal_title：Vision research

authors： Kasamatsu T,Kitano M,Sutter EE,Norcia AM

更新日期：1998-01-01 00:00:00

abstract：:The tilt aftereffect (TAE) was measured with a forced-choice technique for gratings of different spatial frequencies, contrasts and adapting and test durations. At short test durations, a 2 c/deg grating gave a larger TAE than a 10 c/deg, while at long test durations the opposite occurred. Low contrast gratings tended...

journal_title：Vision research

authors： Harris JP,Calvert JE

更新日期：1989-01-01 00:00:00

abstract：:Visual perceptual learning describes the improvement of visual perception with repeated practice. Previous research has established that the learning effects of perceptual training may be transferable to untrained stimulus attributes such as spatial location under certain circumstances. However, the mechanisms involve...

journal_title：Vision research

authors： Larcombe SJ,Kennard C,Bridge H

更新日期：2017-06-01 00:00:00

abstract：:We investigated whether the directional effect on the kappa effect can be attributed to the directional anisotropy of retinotopical space or to the representation of forces provided by environmental contexts (e.g., gravity) in an observed event. We examined whether different contexts with similar directional changes (...

journal_title：Vision research

authors： Masuda T,Kimura A,Dan I,Wada Y

更新日期：2011-08-01 00:00:00

abstract：:Traditional perceptual learning protocols rely almost exclusively on long periods of uninterrupted fixation. Taking a first step towards understanding perceptual learning in natural vision, we had observers report the orientation of a briefly flashed stimulus (clockwise or counterclockwise from a reference orientation...

journal_title：Vision research

authors： Rolfs M,Murray-Smith N,Carrasco M

更新日期：2018-11-01 00:00:00

abstract：:A photic stimulus flashed just before a saccade in the dark tends to be mislocalized in the direction of the saccade. This mislocalization is not only perceptual; it is also expressed by errors of ocular targeting. A particular situation arises if the point of light is flashed twice at the same place, the second time,...

journal_title：Vision research

authors： Schlag J,Schlag-Rey M

更新日期：1995-08-01 00:00:00

abstract：:If two demarcated dots are embedded in separate clusters of similar dots in off centre positions, their perceived separation is biased towards the separation between the centres of the clusters (Morgan, Hole, & Glennerster, 1990). We replicated these results and went on to determine whether a similar bias is present f...

journal_title：Vision research

authors： Seizova-Cajic T,Gillam B

更新日期：2006-08-01 00:00:00

abstract：:Reading in peripheral vision is slow and requires large print, posing substantial difficulty for patients with central scotomata. The purpose of this study was to evaluate the effect of print size on reading speed at different eccentricities in normal peripheral vision. We hypothesized that reading speeds should remai...

journal_title：Vision research

authors： Chung ST,Mansfield JS,Legge GE

更新日期：1998-10-01 00:00:00

abstract：:Edges are key points of information in visual scenes. One important class of models supposes that edges correspond to the steepest parts of the luminance profile, implying that they can be found as peaks and troughs in the response of a gradient (1st derivative) filter, or as zero-crossings in the 2nd derivative (ZCs)...

journal_title：Vision research

authors： Wallis SA,Georgeson MA

更新日期：2009-07-01 00:00:00

abstract：:Two general approaches to the visual control of action have emerged in last few decades, known as the on-line and model-based approaches. The key difference between them is whether action is controlled by current visual information or on the basis of an internal world model. In this paper, we evaluate three hypotheses...

journal_title：Vision research

authors： Zhao H,Warren WH

更新日期：2015-05-01 00:00:00

abstract：:We investigated Werner's binocular depth-contrast effect. Subjects viewed stereograms consisting of a test pattern and an inducing pattern. The half-images of the inducing pattern were either horizontally scaled or sheared relative to each other. Subjects judged the (induced) perceived slant of the test pattern. We we...

journal_title：Vision research

authors： van Ee R,Erkelens CJ

更新日期：1996-08-01 00:00:00

abstract：:To examine how rod and cone function are differentially affected during retinal degeneration, and after subretinal cell grafting, we obtained light- and dark-adaptation curves by recording threshold multiunit responses from the superior colliculus of anesthetized rats. Unoperated RCS dystrophic and non-dystrophic rats...

journal_title：Vision research

authors： Girman SV,Wang S,Lund RD

更新日期：2005-02-01 00:00:00

abstract：:The eyes are always moving even during fixation, making the retinal image move concomitantly. While these motions activate early visual stages, they are excluded from one's perception. A striking illusion reported here renders them visible: a static pattern surrounded by a synchronously flickering pattern appears to m...

journal_title：Vision research

authors： Murakami I

更新日期：2003-04-01 00:00:00