abstract：:It is known that SPARC gates VEGF-A signal transduction towards KDR, the primary angiogenic VEGF receptor. We sought to determine whether inhibition of SPARC activity using anti-SPARC peptide could inhibit laser-induced CNV by promoting binding of VEGF-A to FLT-1. We created anti-SPARC l-peptide and retro-inverso anti...

journal_title：Vision research

authors： Uehara H,Luo L,Simonis J,Singh N,Taylor EW,Ambati BK

更新日期：2010-03-31 00:00:00

abstract：:Retinal amacrine cells (ACs) and ganglion cells (GCs) have been shown to display large morphological diversity, and here we show that four types of ACs and three types of GCs exhibit physiologically-distinguishable properties. They are the sustained ON ACs; sustained OFF ACs; transient ON-OFF ACs; transient ON-OFF ACs...

journal_title：Vision research

authors： Zhang AJ,Wu SM

更新日期：2010-03-17 00:00:00

abstract：:In a figure identification task, we investigated the influence of different visual cue configurations (spatial frequency, orientation or a combination of both) on the human EEG. Combining psychophysics with ERP and time-frequency analysis, we show that the neural response at about 200ms reflects perceptual saliency ra...

journal_title：Vision research

authors： Straube S,Grimsen C,Fahle M

更新日期：2010-03-05 00:00:00

abstract：:We hypothesized that it is the conflict between various cues to distance that have produced results purportedly showing that vergence eye movements induced by disparity change are not an effective cue for depth. Single and compound stimuli were used to examine the perceived motion in depth (MID) produced by simulated ...

journal_title：Vision research

authors： González EG,Allison RS,Ono H,Vinnikov M

更新日期：2010-01-01 00:00:00

abstract：:How does nearby motion affect the perceived speed of a target region? When a central drifting Gabor patch is surrounded by translating noise, its speed can be misperceived over a fourfold range. Typically, when a surround moves in the same direction, perceived centre speed is reduced; for opposite-direction surrounds ...

journal_title：Vision research

authors： Baker DH,Graf EW

更新日期：2010-01-01 00:00:00

abstract：:This paper reviews recent progress towards understanding 3D shape perception made possible by appreciating the significant role that veridicality and complexity play in the natural visual environment. The ability to see objects as they really are "out there" is derived from the complexity inherent in the 3D object's s...

journal_title：Vision research

authors： Pizlo Z,Sawada T,Li Y,Kropatsch WG,Steinman RM

更新日期：2010-01-01 00:00:00

abstract：:Two experiments investigated modulatory effects of a surround upon the perceived speed of a moving central region. Both the surround's depth and velocity (relative to the center) were manipulated. The abilities of younger observers (mean age was 23.1 years) were evaluated in Experiment 1, while Experiment 2 was devote...

journal_title：Vision research

authors： Norman JF,Burton CL,Best LA

更新日期：2010-01-01 00:00:00

abstract：:The visual system's computation of lightness (perceived reflectance) leads to contrast effects in which a gray target region appears lighter on a black background than on a white one. Here we show a paradoxical contrast effect in which targets look lighter after adding regions that increase the scene's average luminan...

journal_title：Vision research

authors： Kramer P,Bressan P

更新日期：2010-01-01 00:00:00

abstract：:We assessed the role of saliency in driving observers to fixate the eyes in social scenes. Saliency maps (Itti & Koch, 2000) were computed for the scenes from three previous studies. Saliency provided a poor account of the data. The saliency values for the first-fixated locations were extremely low and no greater than...

journal_title：Vision research

authors： Birmingham E,Bischof WF,Kingstone A

更新日期：2009-12-01 00:00:00

abstract：:The integration of spatially distinct elements into coherent objects is a fundamental process of vision. Yet notwithstanding an extensive literature on perceptual grouping, we still lack a clear understanding of the representational consequences of grouping disparate visual locations. We investigated this question in ...

journal_title：Vision research

authors： Harrison SJ,Feldman J

更新日期：2009-11-01 00:00:00

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：:One of the ultimate goals of vision research is to understand how some elements are grouped together and differentiated from others to form object representations in a complex visual scene. There exists an extensive literature on this grouping/segmentation problem, but most of the studies have used un-recognizable sti...

journal_title：Vision research

authors： Nygård GE,Looy TV,Wagemans J

更新日期：2009-10-01 00:00:00

abstract：:Recent studies suggest that adaptation effects for face shape and gender transfer from upright to inverted faces more than the reverse. We investigated whether a similar asymmetry occurred for face identity, using a recently developed adaptation method based on contrast-recognition thresholds. When adapting and test s...

journal_title：Vision research

authors： Guo XM,Oruç I,Barton JJ

更新日期：2009-09-01 00:00:00

abstract：:A change in the basic-level class when viewing a sequence of two objects produces a large release from adaptation in LOC compared to when the images are identical. Is this due to a change in semantics or shape? In an fMRI-adaptation experiment, subjects viewed a sequence of two objects and judged whether the stimuli w...

journal_title：Vision research

authors： Kim JG,Biederman I,Lescroart MD,Hayworth KJ

更新日期：2009-09-01 00:00:00

abstract：BACKGROUND:According to the Helmholtz theory of accommodation the loss of accommodation amplitude is caused by the growing sclerosis of the crystalline lens, whereas the ciliary muscle and the lens capsule are mainly uneffected by age. A permanent treatment method for presbyopia which offers a dynamic accommodation abi...

journal_title：Vision research

authors： Schumacher S,Oberheide U,Fromm M,Ripken T,Ertmer W,Gerten G,Wegener A,Lubatschowski H

更新日期：2009-07-01 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：:Exogenous spatial attention can be automatically engaged by a cue presented in the visual periphery. To investigate the effects of exogenous attention, previous studies have generally used highly salient cues that reliably trigger attention. However, the cueing threshold of exogenous attention has been unexamined. We ...

journal_title：Vision research

authors： Fuller S,Park Y,Carrasco M

更新日期：2009-07-01 00:00:00

abstract：:In the natural world, a binocular discrepancy of luminance can signal a glossy surface. Using a spatial forced choice task, we have measured the ability of subjects to detect binocular luminance disparities. We show that the detection of binocular luminance disparity shares several basic psychophysical features with t...

journal_title：Vision research

authors： Formankiewicz MA,Mollon JD

更新日期：2009-07-01 00:00:00

abstract：:In typical binocular rivalry demonstrations, disparate images presented in corresponding locations to the two eyes are found to alternate perceptually over time. Alternation in perception can occur even if the images presented to the two eyes do not overlap, if they are sufficiently close in space. This implies a spat...

journal_title：Vision research

authors： Nichols DF,Wilson HR

更新日期：2009-07-01 00:00:00

abstract：:Perceptual facilitation in detecting low-contrast Gabor patches (GPs) is induced by collinearly oriented high-contrast flankers. Our recent Visual Evoked Potentials (VEPs) study provided new physiological evidence for these collinear interactions, reflected by nonlinear modulation of multiple waveform components and f...

journal_title：Vision research

authors： Sterkin A,Yehezkel O,Bonneh YS,Norcia A,Polat U

更新日期：2009-07-01 00:00:00

abstract：:Camouflage is the primary defense in cuttlefish. The rich repertoire of their body patterns can be categorized into three types: uniform, mottle, and disruptive. Several recent studies have characterized spatial features of substrates responsible for eliciting these body patterns on natural and artificial backgrounds....

journal_title：Vision research

authors： Chiao CC,Chubb C,Buresch K,Siemann L,Hanlon RT

更新日期：2009-06-01 00:00:00

abstract：:We used identification at threshold to systematically measure binding costs in two visual modalities. We presented a conjunction of two features as a signal stimulus and concurrently measured detection and identification performance as a function of three threshold variables: duration, contrast and coherence. Discrepa...

journal_title：Vision research

authors： Seymour KJ,Scott McDonald J,Clifford CW

更新日期：2009-06-01 00:00:00

abstract：:A study is reported in which eye movements were recorded when observers attempted to make a saccade to a target in the presence of a nearby and visually identical distractor. It was found that saccade targeting accuracy was completely unaffected by the presence of the distractor, except in the cases where the distract...

journal_title：Vision research

authors： Findlay JM,Blythe HI

更新日期：2009-06-01 00:00:00

abstract：:Random dot motion (RDM) displays have emerged as one of the standard stimulus types employed in psychophysical and physiological studies of motion processing. RDMs are convenient because it is straightforward to manipulate the relative motion energy for a given motion direction in addition to stimulus parameters such ...

journal_title：Vision research

authors： Pilly PK,Seitz AR

更新日期：2009-06-01 00:00:00

abstract：:We devised an experimental strategy for assessing the cortical cross-talk between ocular subsystems. For this purpose we measured the interocular transfer of adaptation (IOTA) at different levels in the human brain, using orientation-selective fMRI adaptation. We tested 10 normally sighted and 10 stereoblind or stereo...

journal_title：Vision research

authors： Jurcoane A,Choubey B,Mitsieva D,Muckli L,Sireteanu R

更新日期：2009-06-01 00:00:00

abstract：:Human beings perceive 3D shapes veridically, but the underlying mechanisms remain unknown. The problem of producing veridical shape percepts is computationally difficult because the 3D shapes have to be recovered from 2D retinal images. This paper describes a new model, based on a regularization approach, that does th...

journal_title：Vision research

authors： Li Y,Pizlo Z,Steinman RM

更新日期：2009-05-01 00:00:00

abstract：:The relative contributions of stimulus salience and task-related goals in guiding attention remain an issue of debate. Several studies have demonstrated that top-down factors play an important role, as they often override capture by salient irrelevant objects. However, Yantis and Egeth [Yantis, S., & Egeth, H. E. (199...

journal_title：Vision research

authors： Lamy D,Zoaris L

更新日期：2009-05-01 00:00:00

abstract：:When a colour/orientation conjunction search display is immediately preceded by a display that shows either the colour or the orientation of each upcoming search item, search is faster after colour-preview than after orientation-preview. One explanation for this feature asymmetry is that colour has priority access to ...

journal_title：Vision research

authors： Olds ES,Graham TJ,Jones JA

更新日期：2009-05-01 00:00:00

abstract：:Weber contrast, DeltaL/L, is a widely used contrast metric for aperiodic stimuli. Zele, Cao & Pokorny [Zele, A. J., Cao, D., & Pokorny, J. (2007). Threshold units: A correct metric for reaction time? Vision Research, 47, 608-611] found that neither Weber contrast nor its transform to detection-threshold units equates ...

journal_title：Vision research

authors： Vassilev A,Murzac A,Zlatkova MB,Anderson RS

更新日期：2009-03-01 00:00:00

abstract：:In a series of multiple-regression analyses conducted on the French part of the Dundee corpus, the time spent inspecting a target word in a given sentence was found to depend on its degree of semantic relatedness (as assessed in the LSA framework) to two content words belonging to a prior part of the sentence, and loc...

journal_title：Vision research

authors： Pynte J,New B,Kennedy A

更新日期：2009-03-01 00:00:00

abstract：:In natural settings, our eyes tend to track approaching objects. To estimate motion, the brain should thus take account of eye movements, perhaps using retinal cues (retinal slip of static objects) or extra-retinal signals (motor commands). Previous work suggests that extra-retinal ocular vergence signals do not suppo...

journal_title：Vision research

authors： Welchman AE,Harris JM,Brenner E

更新日期：2009-03-01 00:00:00

abstract：:We measured the temporal summation properties of paired flashes to investigate the temporal responses of the chromatic channel in peripheral vision in comparison with those of the luminance channel. The size of the stimulus was scaled according to the cortical magnification factor. The temporal response was biphasic t...

journal_title：Vision research

authors： Masuda O,Uchikawa K

更新日期：2009-03-01 00:00:00

abstract：:Past physiological and psychophysical experiments have shown that attention can modulate the effects of contextual information appearing outside the classical receptive field of a cortical neuron. Specifically, it has been suggested that attention, operating via cortical feedback connections, gates the effects of long...

journal_title：Vision research

authors： De Meyer K,Spratling MW

更新日期：2009-03-01 00:00:00

abstract：:Visual search can simply be defined as the task of looking for objects of interest in cluttered visual environments. Typically, the human visual system succeeds at this by making a series of rapid eye movements called saccades, interleaved by discrete fixations. However, very little is known on how the brain programs ...

journal_title：Vision research

authors： Tavassoli A,Linde Iv,Bovik AC,Cormack LK

更新日期：2009-01-01 00:00:00

abstract：:Feature-directed attention has been recently studied in various psychophysical, electrophysiological, and imaging studies. Convincing evidence has been obtained for its global effectiveness, but there is a debate about the processing fate of non-attended target features. A number of studies demonstrated feature-direct...

journal_title：Vision research

authors： Wegener D,Ehn F,Aurich MK,Galashan FO,Kreiter AK

更新日期：2008-12-01 00:00:00

abstract：:Dark-adapted rods suppress cone-mediated flicker detection. This study evaluates the effect that rod activity has on cone temporal processing by investigating whether rod mediated suppression changes the cone pathway impulse response function, regardless of the form of the temporal signal. Stimuli were generated with ...

journal_title：Vision research

authors： Zele AJ,Cao D,Pokorny J

更新日期：2008-11-01 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：:The orientation disparity field from two orthographic views of an inclined planar surface patch (covered by straight lines) is analyzed, and a new tool to extract the patch orientation is provided: the function coupling the average orientation of each pair of corresponding surface contours with their orientation dispa...

journal_title：Vision research

authors： Fantoni C

更新日期：2008-11-01 00:00:00

abstract：:Three experiments investigated whether and to what extent increases in age affect the functionality of stereopsis. The observers' ages ranged from 18 to 83 years. The overall goal was to challenge the older stereoscopic visual system by utilizing high magnitudes of binocular disparity, ambiguous binocular disparity [c...

journal_title：Vision research

authors： Norman JF,Norman HF,Craft AE,Walton CL,Bartholomew AN,Burton CL,Wiesemann EY,Crabtree CE

更新日期：2008-10-01 00:00:00

abstract：:With luminance gratings, psychophysical thresholds for detecting a small increase in the contrast of a weak 'pedestal' grating are 2-3 times lower than for detection of a grating when the pedestal is absent. This is the 'dipper effect'--a reliable improvement whose interpretation remains controversial. Analogies betwe...

journal_title：Vision research

authors： Georgeson MA,Yates TA,Schofield AJ

更新日期：2008-09-01 00:00:00