Abstract:
:This study evaluated the influence of superimposed luminance flicker on the detection of oscillatory motion. Thresholds for oscillatory motion were determined in the fovea and at 2, 6 and 25 deg in the right field for a small luminous target with and without sinusoidal luminance flicker. At the fovea, flicker modulation up to 80% at frequencies from 1.5 to 9 Hz had no effect on motion detection, except for oscillatory motion at a frequency of 8 Hz, for which thresholds were elevated by about 0.2 log units. In the periphery, flicker elevated motion thresholds up to 0.3-0.4 log units at low and moderate frequencies of oscillation at all locations tested. However, both foveal and peripheral motion thresholds were unaffected by flicker when the luminance of the target was reduced. The absence of a robust effect of target flicker on motion thresholds may be accounted for in part by the comparison of activity across a large population of motion-detecting neurons with different direction preferences. Another contributing factor may be the existence of foveal velocity- and position-detecting mechanisms with similar sensitivities.
journal_name
Vision Resjournal_title
Vision researchauthors
Bedell HE,Johnson CAdoi
10.1016/0042-6989(94)00304-1subject
Has Abstractpub_date
1995-08-01 00:00:00pages
2179-89issue
15eissn
0042-6989issn
1878-5646pii
0042698994003041journal_volume
35pub_type
杂志文章相关文献
VISION RESEARCH文献大全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
pub_type: 杂志文章
doi:10.1016/j.visres.2009.08.014
更新日期:2009-11-01 00:00:00
abstract::Random-dot cinematograms comprising many different, spatially intermingled local motion vectors can produce a percept of global coherent motion in a single direction. Thresholds for discriminating the direction of global motion were measured under various conditions. Discrimination thresholds increased with the width ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(92)90097-3
更新日期:1992-12-01 00:00:00
abstract::We investigated temporal aspects of stereoscopically perceived slant produced by the following transformations: horizontal scale, horizontal shear, vertical scale, vertical shear, divergence and rotation, between the half-images of a stereogram. Six subjects viewed large field stimuli (70 degrees diameter) both in the...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00445-8
更新日期:1998-12-01 00:00:00
abstract::Exposure to continuous illumination disrupts normal ocular development in young chicks, causing severe corneal flattening, shallow anterior chambers and progressive hyperopia ('constant light (CL) effects'). We have studied the minimum requirements of a diurnal light cycle to prevent CL effects. (1) Seven groups of 10...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(00)00098-5
更新日期:2000-01-01 00:00:00
abstract::This study investigated the ability of human observers to discriminate the direction of laterally-moving cyclopean stimuli, in order to assess some of the properties of stereoscopic mechanisms that mediate the perception of cyclopean motion (motion existing at levels of binocular integration). The stimuli were moving ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(92)90122-y
更新日期:1992-01-01 00:00:00
abstract::Finger pointing is a natural human behavior frequently used to draw attention to specific parts of sensory input. Since this pointing behavior is likely preceded and/or accompanied by the deployment of attention by the pointing person, we hypothesize that pointing can be used as a natural means of providing self-repor...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2017.04.001
更新日期:2017-06-01 00:00:00
abstract::Previous studies of peripheral vision have shown that detection acuity is superior to resolution acuity for gratings over a range of contrasts, which is attributed to different limiting mechanisms (contrast insufficiency and neural undersampling) for the two tasks. To extend the analysis to letters in a way that avoid...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2012.02.010
更新日期:2012-04-15 00:00:00
abstract::Previously, we developed a stratified process for slant perception. First, optical transformations in structure-from-motion (SFM) and stereo were used to derive 3D relief structure (where depth scaling remains arbitrary). Second, with sufficient continuous perspective change (≥45°), a bootstrap process derived 3D simi...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2020.04.014
更新日期:2020-08-01 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
pub_type: 杂志文章
doi:10.1016/0042-6989(82)90085-2
更新日期:1982-01-01 00:00:00
abstract::Some results from a survey of 43 patients who had a monofocal intra-ocular-lens (IOL) in one eye and a concentric bifocal intra-ocular-lens in the fellow eye are reported. Twenty patients with 6/9 or better post-operative visual acuity in both eyes, participated in the main part of the study. Optical transfer function...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00447-1
更新日期:1998-09-01 00:00:00
abstract::In search for a singleton target, performance is considerably improved when the target and distractors repeat than when they switch roles, an effect called priming of pop-out or PoP (Maljkovic & Nakayama, 1994). Although this phenomenon has been replicated across a variety of dimensions, orientation PoP has proved to ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.01.008
更新日期:2013-04-05 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
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2014.10.008
更新日期:2015-05-01 00:00:00
abstract::Investigations of binocular visual direction have concentrated mainly on stationary objects. Eye positions were generally not measured and binocular fixation was assumed to be perfect. During the viewing of stationary objects, vergence errors are not negligible but small. During the viewing of moving objects, however,...
journal_title:Vision research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0042-6989(96)00323-9
更新日期:1997-07-01 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::Previous research has shown that cognitive and motor visual systems have separate maps of visual space because spatial values in them can be manipulated independently. Here we ask whether the motor map in turn can be divided into separate representations of space. Forty large saccadic eye movements in darkness resulte...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90088-5
更新日期:1987-01-01 00:00:00
abstract::Marine mammals have lost the ability to express S-cone opsin, and possess only one type of M/L-cone in addition to numerous rods. As they are cone monochromats they should be color blind. However, early behavioral experiments with fur seals and sea lions indicated discrimination ability between many shades of grey and...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2016.04.009
更新日期:2016-08-01 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
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2011.01.006
更新日期:2011-04-22 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
pub_type: 杂志文章
doi:10.1016/j.visres.2011.06.020
更新日期:2011-09-15 00:00:00
abstract::Achromatic losses in glaucoma would be expected to be greater than, or equal to, red-green chromatic losses if the following assumptions are made: (1) the function of the remaining axons is either unchanged or non-selectively reduced; (2) red-green chromatic information is signaled by the midget ganglion cell system; ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00033-3
更新日期:1997-08-01 00:00:00
abstract::We investigate the influence of biased feedback on decision and learning processes in a vernier discrimination task. Subjects adjust their decision criteria and hence their responses according to biased external feedback. However, they do not use learning processes to encode incorrectly classified stimuli. As soon as ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(99)00138-8
更新日期:1999-01-01 00:00:00
abstract::With the identification and structural characterization of several visual pigments has come a new era of investigation. The above comparisons of amino acids sequences predict specific functional domains that may be tested to tell us how visual pigments function to absorb light and transform this "signal" to trigger a ...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/0042-6989(86)90115-x
更新日期:1986-01-01 00:00:00
abstract::We examine how various sources of information contribute to the percept of motion in depth. Subjects were presented with targets moving in depth, and were asked to judge their velocities and final positions. On each presentation, the target's position relative to the two eyes (target vergence), the size of the target'...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(95)00146-8
更新日期:1996-03-01 00:00:00
abstract::We have investigated first-order artifacts in second-order motion perception. Subjects were required to identify the orientation and direction of a drifting sinusoidal contrast modulation. When the carrier consisted of static two-dimensional noise, performance often reflected the use of first-order artifacts that aris...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(96)00147-2
更新日期:1997-01-01 00:00:00
abstract::The minimum stimulus necessary to define motion is a change in position from one location to another in time, but past studies have provided evidence that the human motion system integrates motion over more than two positions. In this study we demonstrate strong sequential interactions affecting perceived direction in...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00084-9
更新日期:1997-10-01 00:00:00
abstract::We present a two-frequency method to investigate lateral interaction components (liERGs) in the human electroretinogram. Adjacent half cycles of sinusoidal gratings were modulated sinusoidally with different temporal frequencies f1 and f2. The liERGs were defined by the Fourier components at the intermodulation freque...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2005.06.025
更新日期:2005-10-01 00:00:00
abstract::Lenses from 27 human eyes ranging in age from 10 to 87 years were used to determine how accommodation and age affect the optical properties of the lens. A scanning laser technique was used to measure focal length and spherical aberration of the lenses, while the lenses were subjected to stretching forces applied throu...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00102-8
更新日期:1998-01-01 00:00:00
abstract::Our purpose was to perform a systematic study of the post-four-muscle-tenotomy procedure changes in target acquisition time by comparing predictions from the behavioral ocular motor system (OMS) model and data from infantile nystagmus syndrome (INS) patients. We studied five INS patients who underwent only tenotomy at...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2008.03.007
更新日期:2008-06-01 00:00:00
abstract::Previous experiments testing grating and vernier acuities in albino central vision are consistent with the hypothesis that the deficit in their monocular spatial processing is mainly due to the increased spacing of their foveal cones. This was tested by measuring albino spatial frequency discrimination over the range ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(89)90138-7
更新日期:1989-01-01 00:00:00
abstract::The functional role of three putative neurotransmitter systems in the visual cortex is compared; the GABAergic inhibitory interneurons, the interneurones containing somatostatin and the cholinergic input originating from the nucleus basalis of Meynert (nbM). Evidence is presented to support the role of GABAergic proce...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(85)90062-8
更新日期:1985-01-01 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