Abstract:
:In this paper we use a dynamic noise-masking paradigm to explore the nature of the mechanisms mediating the motion perception of drifting isoluminant red-green gratings. We compare contrast thresholds for the detection and direction discrimination of drifting gratings (1.5 cpd), over a range of temporal frequencies (0.5-9 Hz) in the presence of variable luminance or chromatic noise. In the first experiment, we used dynamic luminance noise to show that direction thresholds for red-green grating motion are masked by luminance noise over the entire temporal range tested, whereas detection thresholds are unaffected. This result indicates that the motion of nominally isoluminant red-green gratings is mediated by luminance signals. We suggest that stimulus-based luminance artifacts are not responsible for this effect because there is no masking of the detection thresholds. Instead we propose that chromatic motion thresholds for red-green isoluminant gratings are mediated by dynamic luminance artifacts that have an internal, physiological origin. We have termed these "temporal chromatic aberration". In the second experiment, we used dynamic chromatic noise masking to test for a chromatic contribution to red-green grating motion. We were unable to find conclusive evidence for a contribution of chromatic mechanisms to the chromatic grating motion, although a contribution at very high chromatic contrasts cannot be ruled out. Our results add to a growing body of evidence indicating the presence of dynamic, internal luminance artifacts in the motion of chromatic stimuli and we show that these occur even at very low temporal rates. Our results are compatible with our previous work indicating the absence of a chromatic mechanism for first order (quasi-linear) apparent motion [Vision Res. 40 (2000) 1993]. We conclude that previous conclusions based on the motion of chromatic red-green gratings should be reassessed to determine the contribution of dynamic luminance artifacts.
journal_name
Vision Resjournal_title
Vision researchauthors
Mullen KT,Yoshizawa T,Baker CL Jrdoi
10.1016/s0042-6989(03)00115-9subject
Has Abstractpub_date
2003-05-01 00:00:00pages
1235-47issue
11eissn
0042-6989issn
1878-5646pii
S0042698903001159journal_volume
43pub_type
杂志文章相关文献
VISION RESEARCH文献大全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
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90078-0
更新日期:1983-01-01 00:00:00
abstract::Large and small letter contrast sensitivity and visual acuity were assessed in 37 elderly eyes (mean VA -0.01 logMAR, Snellen 6/6) and their lens opacities were categorised and graded using the LOCS III system. Large letter contrast sensitivity was often not reduced in cataract from age-matched normal values and provi...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00382-9
更新日期:1998-06-01 00:00:00
abstract::Different electrodes and stimulus protocols commonly used for electroretinography in rodent eyes were compared for convenience of use, degree of damage to corneal epithelium, and for magnitude of amplitude, reproducibility, left versus right eye accuracy, and reliability of recorded parameters of the flash electroreti...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(01)00103-1
更新日期:2001-08-01 00:00:00
abstract::Deprivation of patterned vision of frontal eyed mammals early in postnatal life alters structural and functional attributes of neurones in the central visual pathways, and can produce severe impairments of the vision of the deprived eye that resemble the visual loss observed in human amblyopia. A traditional approach ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.12.012
更新日期:2015-09-01 00:00:00
abstract::Microglia dynamically prune synaptic contacts during development, and digest waste that accumulates in degeneration and aging. In many neurodegenerative diseases, microglial activation and phagocytosis gradually increase over months or years, with poorly defined initial triggering events. Here, we describe rapid retin...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.07.011
更新日期:2014-09-01 00:00:00
abstract::Muscarinic receptors are identified in bovine retina membranes by the specific binding of 1-[benzilic-4,4'-3H]-quinuclidinyl benzilate [3H]-QNB. Binding occurs to one population of non-cooperative binding sites: KD = 0.11 +/- 0.02 nM and Bmax = 0.61 +/- 0.07 pmol/mg protein. Competition binding curves of the M1-select...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(88)90151-4
更新日期:1988-01-01 00:00:00
abstract::The present experiments indicate that in a 7-AFC double judgment accuracy task with unmasked stimuli, cue location response bias can be quantified and removed, revealing unbiased improvements in response accuracy for valid cues compared to invalid cues. By testing for cueing effects over a range of contrast levels wit...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.07.017
更新日期:2014-12-01 00:00:00
abstract::The electroretinogram (ERG) vs perfusion pressure relation was studied in anesthetized rabbits during mechanically induced changes in mean arterial pressure (MAP). After 1 hr of dark adaptation, ERGs were obtained at perfusion pressures from 10 to 95 mmHg with each pressure held for 30-60 sec, and at three levels from...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00044-8
更新日期:1997-09-01 00:00:00
abstract::Previous studies have shown that attention to a particular stimulus feature, such as direction of motion or color, enhances neuronal responses to unattended stimuli sharing that feature. We studied this effect psychophysically by measuring the strength of the motion aftereffect (MAE) induced by an unattended stimulus ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.03.003
更新日期:2006-09-01 00:00:00
abstract::Some blind humans use sound to navigate by emitting mouth-clicks and listening to the echoes that reflect from silent objects and surfaces in their surroundings. These echoes contain information about the size, shape, location, and material properties of objects. Here we present results from an fMRI experiment that in...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.07.004
更新日期:2015-04-01 00:00:00
abstract::We set out to determine whether extra-striate ventral stream function was compromised in amblyopia and to compare any observed deficit with previous data on comparable dorsal stream function. We devised a multi-element orientation task where orientation coherence sensitivity could be measured in a comparable way to mo...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.02.005
更新日期:2013-04-19 00:00:00
abstract::the foveal vision of certain patients afflicted with retinitis pigmentosa may be mediated solely by a long wavelength sensitivity (lws) mechanism, because (1) increment threshold data could always be fitted to a single template curve with unity slope, (2) test and field sensitivities differ only by a proportionality c...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(82)90178-x
更新日期:1982-01-01 00:00:00
abstract::In two experiments we measured object recognition performance as a function of delay. In Experiment 1 we presented half of an image of an object, and then the other half after a variable delay. Objects were subdivided into top versus bottom halves, left versus right halves, or vertical strips. In Experiment 2 we separ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2005.01.009
更新日期:2005-06-01 00:00:00
abstract::Retinotopic encoding is preserved in primate visual cortex. However, several physiological and psychophysical studies have revealed that visual processes can be disengaged from retinotopic coordinates. We examined whether this non-retinotopic processing is common to humans and pigeons, two visually dominant vertebrate...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.08.007
更新日期:2014-10-01 00:00:00
abstract::The critical durations for temporal integration at threshold were obtained for lights of various wavelengths, presented both against darkness and against achromatic or chromatic backgrounds of different luminances. The critical duration (tc) was defined by a point of intersection of the two lines with the slopes of ze...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90031-9
更新日期:1987-01-01 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
pub_type: 杂志文章
doi:10.1016/s0042-6989(01)00274-7
更新日期:2002-01-01 00:00:00
abstract::Increment thresholds were measured over a range of adapting illuminances using a modified automated static perimeter. The data were fitted to a threshold versus intensity model (logT - logT(0) + log((A + A(0))/A(0))n) and the values logT(0) and logA(0) estimated. The effect of eccentricity and age on logT(0) and logA(...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2004.09.008
更新日期:2005-02-01 00:00:00
abstract::Sex differences in macular pigment (MP) optical density (measured psychophysically) were examined. Concentrations of lutein and zeaxanthin (L and Z) (non-separated) and beta-carotene (BC) in the blood were determined using reverse phase high-performance liquid chromatography. Dietary intake of L and Z, BC, fat, and ir...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(95)00290-1
更新日期:1996-07-01 00:00:00
abstract::A previous study (Vision Research 51 (2011) 1192-1205) found evidence for semantic guidance of visual attention during the inspection of real-world scenes, i.e., an influence of semantic relationships among scene objects on overt shifts of attention. In particular, the results revealed an observer bias toward gaze tra...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.08.019
更新日期:2014-12-01 00:00:00
abstract::Tse (2005) recently introduced a new class of illusory brightness changes where shifts of attention lead to shifts in perceived brightness across overlapping, transparent figures, under conditions of visual fixation. In the absence of endogenous attentional shifts, illusory brightness changes appear to shift from figu...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.05.007
更新日期:2006-10-01 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
pub_type: 杂志文章
doi:10.1016/j.visres.2009.11.011
更新日期:2010-01-01 00:00:00
abstract::The distal photoreceptors in the tiered retina of Papilio exhibit different spectral sensitivities. There are at least two types of short-wavelength sensitive receptors: an ultraviolet receptor with a normal spectral shape and a violet receptor with a very narrow spectral bandwidth. Furthermore, a blue receptor, a dou...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(98)00070-4
更新日期:1999-01-01 00:00:00
abstract::We sought to determine whether the cross-correlation between signals and masks consisting of Gaussian modulated grating patterns is consistent with observed psychophysical masking effects. Our experimental results support this relationship, and suggest further specifications for the determinants of pattern masking eff...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90209-4
更新日期:1987-01-01 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
pub_type: 杂志文章
doi:10.1016/j.visres.2004.11.014
更新日期:2005-05-01 00:00:00
abstract::In this paper, an extended multifocal VEP/ERG paradigm, referred to as the unified multifocal electroretinography and visual evoked potential paradigm (UMEV), is presented. This paradigm allows a simultaneous recording of luminance responses, temporal interactions, spatial interactions and spatial-temporal interaction...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(03)00040-3
更新日期:2003-07-01 00:00:00
abstract::A masking paradigm was employed to measure the spatial frequency selectivity of channels underlying human stereopsis. Observers viewed spatially filtered (0.4 octave bandwidth) random-dot stereograms in which a disparate bar appeared in either the top or bottom half of the display; superimposed on one RDS half-image w...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(91)90043-5
更新日期:1991-01-01 00:00:00
abstract::A theory of retinal colour coding based closely on recent anatomical and physiological results is presented. Opponent colour channels are shown to be an inevitable result of any randomly distributed retinal cone mosaic, the structure of red-green opponent colour channels remaining uninfluenced by a predominance of "re...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90128-1
更新日期:1983-01-01 00:00:00
abstract::Bubbles is a classification image technique that randomly samples visual information from input stimuli to derive the diagnostic features that observers use in visual categorization tasks. To reach statistical significance, Bubbles performs an exhaustive and repetitive search in the stimulus space. To reduce the searc...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2011.04.007
更新日期:2011-06-21 00:00:00
abstract::Recent evidence suggests a double dissociation of size and spacing limit on letter recognition-it is limited by size in the fovea and critical spacing in the normal periphery. Here, we evaluated whether size or spacing limits letter recognition in people with age-related macular degeneration (AMD) who must use their p...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.06.015
更新日期:2014-08-01 00:00:00
abstract::Are surfaces' colours judged from weighted averages of the light that they reflect to the eyes and the colour contrast at their borders? To find out we asked subjects to set the colour and luminance of test disks to match reference disks, on various backgrounds, and analysed the variability in their settings. Most of ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.09.022
更新日期:2007-01-01 00:00:00