Perceptual learning of apparent motion mediated through ON- and OFF-pathways in human vision.

abstract：:Previous studies have indicated that peripheral resolution for achromatic gratings is sampling limited and directly related to the density of the underlying midget ganglion cell population. Previous studies by the authors have shown that peripheral resolution for blue-cone isolating gratings is also sampling limited, ...

journal_title：Vision research

authors： Zlatkova MB,Coulter E,Anderson RS

更新日期：2003-01-01 00:00:00

abstract：:An analytical description of the point spread function (PSF) for human foveal vision, together with its closed form two-dimensional Fourier transform, the modulation transfer function (MTF), is proposed. It also possesses an analytical line spread function (LSF) counterpart. It fits to both PSF and MTF experimental da...

journal_title：Vision research

authors： IJspeert JK,van den Berg TJ,Spekreijse H

更新日期：1993-01-01 00:00:00

abstract：:Small spots, lines and Gabor patterns can be easier to detect when they are superimposed upon similar spots, lines and Gabor patterns. Traditionally, such facilitation has been understood to be a consequence of nonlinear contrast transduction. Facilitation has also been reported to arise from non-overlapping patterns ...

journal_title：Vision research

authors： Solomon JA,Watson AB,Morgan MJ

更新日期：1999-03-01 00:00:00

abstract：:From the earliest stages of sensory processing, neurons show inherent non-linearities: the response to a complex stimulus is not a sum of the responses to a set of constituent basis stimuli. These non-linearities come in a number of forms and have been explained in terms of a number of functional goals. The family of ...

journal_title：Vision research

authors： Golden JR,Vilankar KP,Wu MC,Field DJ

更新日期：2016-03-01 00:00:00

abstract：:Differential spatial displacement discrimination thresholds were determined for a configuration of three identical Gaussian modulated patches of sinusoidal grating presented with equal orientation and at threshold luminance contrast. The patches were arranged one above the other at equal spatial intervals. The orienta...

journal_title：Vision research

authors： Toet A,Koenderink JJ

更新日期：1988-01-01 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 ability to identify faces is of critical importance for normal social interactions. Previous evidence suggests that early visual deprivation may impair certain aspects of face recognition. The effects of strabismic amblyopia on face processing have not been investigated previously. In this study, a group of indivi...

journal_title：Vision research

authors： Cattaneo Z,Vecchi T,Monegato M,Pece A,Merabet LB,Carbon CC

更新日期：2013-03-22 00:00:00

abstract：:Holistic processing, the decoding of the global structure of a stimulus while the local parts are not explicitly represented, is a basic characteristic of object perception. The current study was aimed to test whether such a representation could be created even for objects that violate fundamental principles of spatia...

journal_title：Vision research

authors： Freud E,Avidan G,Ganel T

更新日期：2013-12-18 00:00:00

abstract：:A counterphase-modulated (i.e. contrast reversing) pattern will affect hypothetical neural elements sensitive to motion as well as hypothetical elements sensitive to changes in contrast and other elements sensitive to local luminance. Attempts to describe visual evoked potentials (VEPs) to contrast reversal entirely i...

journal_title：Vision research

authors： Spekreijse H,Dagnelie G,Maier J,Regan D

更新日期：1985-01-01 00:00:00

abstract：:It is well known that object recognition requires spatial frequencies exceeding some critical cutoff value. People with central scotomas who rely on peripheral vision have substantial difficulty with reading and face recognition. Deficiencies of pattern recognition in peripheral vision, might result in higher cutoff r...

journal_title：Vision research

authors： Kwon M,Legge GE

更新日期：2011-09-15 00:00:00

abstract：:We studied direction discrimination for lines moving obliquely relative to their orientation. Manipulating contrast, length and duration of motion, we found systematic errors in direction discrimination at low contrast, long length and/or short durations. These errors can be accounted for by a competition between ambi...

journal_title：Vision research

authors： Lorenceau J,Shiffrar M,Wells N,Castet E

更新日期：1993-06-01 00:00:00

abstract：:A subject with an unually large cortical scotoma, leaving a 9 degrees hemifield of vision in each eye, showed improvement with practice in pointing to an oscillating target positioned within the scotoma. The practice effect transferred to low-contrast targets and to stationary ones, though oscillating targets were alw...

journal_title：Vision research

authors： Bridgeman B,Staggs D

更新日期：1982-01-01 00:00:00

abstract：:It is now clear, contrary to previous conclusions, that motion may be conveyed by purely chromatic stimuli. The question considered here is how the mechanisms for assessing motion of luminance and chromatic stimuli differ. The dependence on contrast of amplitude thresholds for the perception of oscillatory motion was ...

journal_title：Vision research

authors： Krauskopf J,Li X

更新日期：1999-10-01 00:00:00

abstract：:Adaptation paradigms highlight the dynamic nature of face coding and suggest that identity is coded relative to an average face that is tuned by experience. In low-level vision, adaptive coding can enhance sensitivity to differences around the adapted level. We investigated whether sensitivity to differences around th...

journal_title：Vision research

authors： Rhodes G,Maloney LT,Turner J,Ewing L

更新日期：2007-03-01 00:00:00

abstract：:According to the Oppel-Kundt illusion, a filled space appears larger than an empty one. In the present research we studied how textural characteristics affect the perceived size of two-dimensional patterns. We investigated the perceived extension of square textures by manipulating spatial frequency and filling microel...

journal_title：Vision research

authors： Giora E,Gori S

更新日期：2010-11-23 00:00:00

abstract：:Discrimination between a figure and its surround is an important first step of pattern recognition. This discrimination usually relies, as a first step, on the detection of borders between a figure and its surround, for example based on spatial gradients in luminance, colour, or texture. There is evidence that neurone...

journal_title：Vision research

authors： Fahle M,Quenzer T,Braun C,Spang K

更新日期：2003-01-01 00:00:00

abstract：PURPOSE:A major drawback of the mouse model of myopia is that the ocular dimensions cannot be measured in vivo, and that histological techniques post-mortem suffer from limited resolution. We have tested the potential of a newly developed technique, optical low coherence interferometry (OLCI), adapted for short measure...

journal_title：Vision research

authors： Schmucker C,Schaeffel F

更新日期：2004-01-01 00:00:00

abstract：:Peripheral resolution acuity for achromatic gratings is known to be limited by the density of the underlying ganglion cell sampling array. After confirming isolation of the short-wavelength sensitive (SWS) system using chromatic adaptation methods, we wished to determine if resolution is limited by blue/yellow ganglio...

journal_title：Vision research

authors： Anderson RS,Zlatkova MB,Demirel S

更新日期：2002-04-01 00:00:00

abstract：:It has been known for some time that visual acuity in amblyopia is higher for single letters than for letters in a row (termed crowding). Early work showed that this could not be accounted for on the basis of the destructive interaction of adjacent contours (termed contour interaction), which was shown to be, in resol...

journal_title：Vision research

authors： Hess RF,Dakin SC,Tewfik M,Brown B

更新日期：2001-08-01 00:00:00

abstract：:Studies of high-level models of visual object categorization have left unresolved issues of neurobiological relevance, including how features are extracted from the image and the role played by memory capacity in categorization performance. We compared the ability of a comprehensive set of models to match the categori...

journal_title：Vision research

authors： Peters RJ,Gabbiani F,Koch C

更新日期：2003-09-01 00:00:00

abstract：:By presenting oriented Gabor patches either monocularly or binocularly, we dissociated retinal orientation from perceived tilt and perceived slant. After adapting to binocular patches, with zero apparent tilt and non-zero slant, small tilt after-effects (TAEs) and large slant after-effects (SAE) were measured. Adaptin...

journal_title：Vision research

authors： Adams WJ,Mamassian P

更新日期：2002-10-01 00:00:00

abstract：:Patients with retinitis pigmentosa (RP) show delayed inner retinal responses as measured by the cone ERG response to a 30 Hz stimulus. To determine the extent to which this delay results from abnormalities of cone phototransduction, cone ERGs to single flashes were obtained from 21 patients with RP and a model of cone...

journal_title：Vision research

authors： Hood DC,Birch DG

更新日期：1996-06-01 00:00:00

abstract：:A number of researchers have suggested that in order to understand the response properties of cells in the visual pathway, we must consider the statistical structure of the natural environment. In this paper, we focus on one aspect of that structure, namely, the correlational structure which is described by the amplit...

journal_title：Vision research

authors： Field DJ,Brady N

更新日期：1997-12-01 00:00:00

abstract：:Varying short-range apparent motion (AM) stimulus displacements from 2.7 to 21.6 min it was found that VEP amplitudes varied as a function of the limits for short-range AM described using time-till-breakdown as a behavioural measure of AM strength. This VEP amplitude difference was, however, in the reverse direction t...

journal_title：Vision research

authors： Manning ML,Finlay DC,Fulham WR

更新日期：1991-01-01 00:00:00

abstract：:The perception of blackness was investigated by measuring spectral efficiency and field additivity under conditions of temporal induction. For both purposes, observers foveally viewed a 0.75 deg, inducing stimulus for 5 sec followed immediately (or 200 msec later) by a broadband (5500 K) reference stimulus of the same...

journal_title：Vision research

authors： Volbrecht VJ,Werner JS

更新日期：1989-01-01 00:00:00

abstract：:Receptive fields formed by ganglion cells were measured simultaneously in time and space in the adult and tadpole retinas. The spatio-temporal receptive-fields (STRFs) were measured by cross-correlating the spatio-temporal white-noise stimulus with the cells' spike discharges. Crosscorrelation was made photographicall...

journal_title：Vision research

authors： Shingai R,Hida E,Naka K

更新日期：1983-01-01 00:00:00

abstract：:An observer's ability to discriminate the angular direction of a moving grating depends on the grating orientation. Observers can more accurately judge the angular direction of vertical or horizontal gratings than oblique gratings. We discovered that this oblique effect becomes very large at high spatial frequencies i...

journal_title：Vision research

authors： Coletta NJ,Segu P,Tiana CL

更新日期：1993-12-01 00:00:00

abstract：:Monocular, steady-state accommodative responses were measured as a function of spatial frequency of simple sinusoidal gratings presented at high contrast and target vergence levels in amblyopes, as well as in strabismics without amblyopia and in visually-normal control subjects. In general, spatial frequency dependenc...

journal_title：Vision research

authors： Ciuffreda KJ,Hokoda SC

更新日期：1983-01-01 00:00:00

abstract：:We have examined the ability of observers to parse bimodal local-motion distributions into two global motion surfaces, either overlapping (yielding transparent motion) or spatially segregated (yielding a motion boundary). The stimuli were random dot kinematograms in which the direction of motion of each dot was drawn ...

journal_title：Vision research

authors： Smith AT,Curran W,Braddick OJ

更新日期：1999-03-01 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