Abstract：
:The contrast transducer function (d' vs. contrast) for sine gratings was claimed to come up from some non-zero contrast value rather than from the origin. This implies that there is a point (a hard threshold) on the grating contrast axis below which observers could not distinguish between presentations containing gratings and those containing a homogeneous field. We studied the ability to order sub-threshold square wave gratings and found, to the contrary, that observers were able to do this no matter how low the contrasts. At the same time, the observers failed to order the sub-threshold gratings when they were of the same contrast. The latter is inconsistent with signal detection theory which predicts that an observer's judgements are based on the same ordered set of sensory states irrespective of whether the stimuli differ or are the same. On the other hand, these data can be reconciled with the notion of a threshold if the latter is thought of as a fuzzy rather than a sharp margin on the contrast axis.
journal_name
Vision Resjournal_title
Vision researchauthors
Logvinenko AD,Byth W,Vityaev EEdoi
10.1016/j.visres.2003.09.015subject
Has Abstractpub_date
2004-02-01 00:00:00pages
287-96issue
3eissn
0042-6989issn
1878-5646pii
S0042698903005698journal_volume
44pub_type
杂志文章相关文献
VISION RESEARCH文献大全abstract：:Flanking lateral masks enhance or weaken the detection of a low-contrast visual target. This effect depends on the target-to-mask distance. An improvement of stimulus detection can also be observed when participants imagine (i.e., retrieve from memory) the previously presented masks. In this double-blind, placebo-cont...
journal_title：Vision research
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.visres.2014.10.030
更新日期：2015-01-01 00:00:00
abstract：:Two-frame random-element kinematograms were used to study the matching algorithm employed by the visual system to keep track of moving elements. Previous data have shown that the maximum spatial displacement detectable (dmax) for random-dot kinematogram stimuli increases both with increasing dot size and with decreasi...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(96)89252-2
更新日期：1996-02-01 00:00:00
abstract：PURPOSE:The mouse eye has potential to become an important model for studies on the genetic control of eye growth and myopia. However, no data are published on the development of its optical properties. We developed a paraxial schematic model of the growing eye for the most common laboratory mouse strain, the C57BL/6 m...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2004.03.011
更新日期：2004-01-01 00:00:00
abstract：:Light-induced protein interaction as part of the process of visual transduction in arthropods with rhabdomeric photoreceptors was investigated biochemically by using crayfish retina. Two kinds of retinal buffer soluble proteins (one of 40 kDa and the other of 46 kDa) were found to bind to the irradiated rhabdomeric me...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(93)90120-l
更新日期：1993-12-01 00:00:00
abstract：:We report here measurements of visual evoked potential (VEP) activity after induction of afterimages in human observers. Drifting gratings normally produce no measurable phase synchronized VEP. However, after an afterimage of a high contrast grating of the same orientation and spatial frequency of that of the drifting...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(87)90182-9
更新日期：1987-01-01 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
pub_type： 杂志文章
doi：10.1016/s0042-6989(97)00181-8
更新日期：1997-12-01 00:00:00
abstract：:How is a single visual direction assigned to a binocular feature for which the left and right eyes are signaling different directions? According to geometrical principles, binocular visual direction is the average of the visual directions measured from the left and right eyes. Contrary to this prediction, we have foun...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(95)00095-h
更新日期：1996-01-01 00:00:00
abstract：:Observers viewed 200 msec presentations of gratings containing first (0.5 c/deg) and third (1.5 c/deg) harmonic components. The phase of the third harmonic and the absolute position of the grating on the screen varied randomly from trial to trial. Classification of the phase relation (0, 90, 180 or 270 deg was 99% per...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(84)90157-3
更新日期：1984-01-01 00:00:00
abstract：:The purpose of this study was to examine if there is an ERG component (alpha-wave, b-wave, oscillatory potentials) which can be used to account for the intraretinal processing time. To address this issue, ERGs and LGN unit responses were recorded simultaneously from anesthetized and paralyzed rabbits. A gradual decrea...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(90)90048-p
更新日期：1990-01-01 00:00:00
abstract：:Shape representation is accomplished by a series of cortical stages in which cells in the first stage (V1) have local receptive fields tuned to contrast at a particular scale and orientation, each well modeled as a Gabor filter. In succeeding stages, the representation becomes largely invariant to Gabor coding (Kobata...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2011.12.012
更新日期：2012-02-15 00:00:00
abstract：:Match stimuli presented on one side of a contextual image were adjusted to have the same appearance as test stimuli presented on the other side. Both full color and isochromatic contextual images were used. Contextual image pairs were constructed that had identical S-cone image planes, while their L- and M-cone image ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(00)00125-5
更新日期：2000-01-01 00:00:00
abstract：:We examined variation in the visual system both within and among seven species of darters, colorful freshwater fishes of the genus Etheostoma. Using microspectrophotometry, we found that darters possess rod photoreceptor cells, single cone photoreceptor cells containing middle wavelength sensitive (MWS) visual pigment...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2011.12.005
更新日期：2012-02-15 00:00:00
abstract：:We have found evidence for ultraviolet visual capabilities in a Lake Malawi cichlid fish, Metriaclima zebra. Microspectrophotometry of single cones revealed a visual pigment with peak sensitivity at 368+/-4 nm. M. zebra also expresses a putative ultraviolet opsin gene whose sequence is closely related to the SWS-1 ops...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(99)00238-2
更新日期：2000-01-01 00:00:00
abstract：:Patients with central vision loss are often advised by low vision rehabilitation professionals to read bolder print to ameliorate their reading difficulties. Is boldface print really effective in improving reading performance for people with central vision loss? In this study, we evaluated how reading speed depends on...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2018.10.012
更新日期：2018-12-01 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
pub_type： 杂志文章
doi：10.1016/j.visres.2005.02.002
更新日期：2005-07-01 00:00:00
abstract：:A novel type of dynamic random-dot stereogram (DRS) was used to study vergence movements and depth detection in response to temporal modulations of interocular correlation. Each DRS consisted of the repeated presentation of a pair of correlated images alternated by the presentation of a pair of uncorrelated images. Th...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(01)00004-9
更新日期：2001-01-01 00:00:00
abstract：:To pursue a small target moving in front of a drifting background, motion vectors from the target need to be integrated and segmented from those belonging to the background. Smooth pursuit eye movements typically integrate target and background directions initially and after some time shift towards the veridical targe...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2012.02.001
更新日期：2012-03-15 00:00:00
abstract：:A generally accepted notion in binocular vision is that we see the world as if viewed by a single eye, the cyclopean eye. A consequence of seeing the world from a single point in space is that the outlines of occluding and occluded surfaces have the same shape. We designed stereograms in which subjects aligned binocul...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(95)00268-5
更新日期：1996-07-01 00:00:00
abstract：:In human subjects with peripheral retinal detachments, visual deficits are not restricted to the detached retina but are also present in the non-detached tissue. Based upon studies on a rabbit model of rhegmatogenous retinal detachment, we propose a glial cell-mediated mechanism of spread of retinal degeneration into ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2004.08.028
更新日期：2005-08-01 00:00:00
abstract：:Blakeslee and McCourt ((1997) Vision Research, 37, 2849-2869) demonstrated that a multiscale array of two-dimensional difference-of-Gaussian (DOG) filters provided a simple but powerful model for explaining a number of seemingly complex features of grating induction (GI), while simultaneously encompassing salient feat...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/s0042-6989(99)00119-4
更新日期：1999-10-01 00:00:00
abstract：:Which coordinate system do we use to track moving objects? In a previous study using smooth pursuit eye movements, we argued that targets are tracked in both retinal (retinotopic) and scene-centered (allocentric) coordinates (Howe, Pinto, & Horowitz, 2010). However, multiple object tracking typically also elicits sacc...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2011.01.001
更新日期：2011-03-02 00:00:00
abstract：:We investigated temporal summation of the rods in a complete achromat, who lacks cone vision. Critical duration (tc) was estimated both at the achromat's preferred area of fixation and at an area 12 deg laterally in the nasal visual field. Comparable tc determinations were made in a normal trichromat. At background lu...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(88)90042-9
更新日期：1988-01-01 00:00:00
abstract：:The purpose of this study was to investigate the effect of dot speed and dot density on the development of global motion perception by comparing the performance of adults and children (5-6years old) on a direction-discrimination task. Motion coherence thresholds were measured at two dot speeds (1 and 4deg/s) and three...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2012.02.016
更新日期：2012-06-01 00:00:00
abstract：PURPOSE:Evidence exists for an additional inhibitory accommodative control system mediated by the sympathetic branch of the autonomic nervous system (ANS). This work aims to show the relative prevalence of sympathetic inhibition in young emmetropic and myopic adults, and to evaluate the effect of sympathetic facility o...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2004.11.022
更新日期：2005-06-01 00:00:00
abstract：:The foveal region of the retina has a yellow pigmentation composed primarily of the carotenoids lutein and zeaxanthin. Past studies have shown that cigarette smoking depresses carotenoid concentrations in the blood. This is the first report on the effects of cigarette smoking on carotenoids in the retina. Macular pigm...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(96)00008-9
更新日期：1996-09-01 00:00:00
abstract：:In this work, optical retardation (OR) was investigated in corneal stroma collagen fibers from nonobese diabetic (NOD) and healthy (BALB/c) mice. Linear dichroism (LD) was investigated in corneas stained with Ponceau SS and Toluidine Blue, using microspectrophotometer. NOD corneas showed higher OR values than the cont...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2007.02.011
更新日期：2007-12-01 00:00:00
abstract：:In a series of psychophysical experiments, observers compared the apparent contrast of a dichoptic stimulus (contrast edges of orthogonal orientations in the two eyes) and a monocular stimulus ( a pie pattern in one eye and a blank field in the other eye). When the contrast of the dichoptic stimulus was low (2-3%) the...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(95)00009-o
更新日期：1995-09-01 00:00:00
abstract：:The paper reports psychophysical experiments set up to study the visual cues used in texture discrimination. In particular, the special role of "textons", i.e. distinct visual features such as blobs of different size, lines at different orientation, line intersections ("crossings") and line ends ("terminators") which ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(91)90120-t
更新日期：1991-01-01 00:00:00
abstract：:While it is known that scleral search coils-measuring the rotation of the eye globe--and modern, video based eye trackers-tracking the center of the pupil and the corneal reflection (CR)--produce signals with different properties, the mechanisms behind the differences are less investigated. We measure how the size of ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/j.visres.2016.01.009
更新日期：2016-04-01 00:00:00
abstract：:The effects of the involuntary ocular oscillations on visual resolution was examined in 22 albinos and 11 idiopaths with congenital nystagmus. The idiopaths showed a linear relationship between the proportion of the slow phase spent at low velocities (less than or equal to deg/sec) and the log of the minimum angle of ...
journal_title：Vision research
pub_type： 杂志文章
doi：10.1016/0042-6989(91)90063-b
更新日期：1991-01-01 00:00:00
