Abstract:
:If the spatial-frequency of sinusoidal signals in a contrast-detection experiment varies randomly from trial to trial, then performance is decreased compared with that in a situation where it remains constant. This spatial-frequency uncertainty effect can more or less be compensated by presenting informative cues shortly before each trial. Single-band, as well as multiple-band models, have been proposed to explain the uncertainty and cuing effects. While the latter assume that under uncertainty multiple channels are monitored simultaneously, the former propose that in each trial a single, but sometimes inappropriate, channel is selected for monitoring. Until now it is open which of these models is valid. Therefore, psychometric functions were collected under different conditions of spatial-frequency uncertainty. It appears that the size of the uncertainty effect varies with spatial-frequency. This result can be explained by a multiple-band model, as computational analysis reveals.
journal_name
Vision Resjournal_title
Vision researchauthors
Hübner Rdoi
10.1016/0042-6989(96)00088-0subject
Has Abstractpub_date
1996-11-01 00:00:00pages
3429-39issue
21eissn
0042-6989issn
1878-5646pii
0042-6989(96)00088-0journal_volume
36pub_type
杂志文章相关文献
VISION RESEARCH文献大全abstract::Interocular transfer of a spatial frequency shift was obtained with equiluminous color gratings. Gratings which combined both color and luminance contrast yielded small aftereffects and no interocular transfer. Recent electrophysiological work has uncovered color-sensitive binocularly driven cells in visual cortex. Th...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90004-4
更新日期:1983-01-01 00:00:00
abstract::This is the first study to demonstrate the selectivity of learning for contrast polarity. The finding is the main result of an investigation into the existence of central and peripheral vision mechanisms selective for contrast polarity within the texture-segregation process, using the perceptual learning paradigm in a...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.05.002
更新日期:2006-10-01 00:00:00
abstract::Previous studies have presented evidence for the existence of channels tuned to the spatial frequency (SF) of binocular disparity modulation. Bandwidths reported for masking curves were extremely narrow, possibly because of off-frequency viewing, whereby observers can best detect a signal with a channel tuned to an SF...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)90016-7
更新日期:1994-03-01 00:00:00
abstract::Excitation mapping is a method of visualizing the signaling history of neurons with permeant organic cations. It is compatible with high-resolution imaging, allowing concurrent visualization of all neuronal classes and their glutamate-gated excitation histories. Excitation mapping documents the stability and precision...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2005.07.025
更新日期:2005-12-01 00:00:00
abstract::We investigated global motion processing in a group of adult amblyopes using a method that allows us to factor out any influence of the known contrast sensitivity deficit. We show that there are independent global motion processing deficits in human amblyopia that are unrelated to the contrast sensitivity deficit, and...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(02)00684-3
更新日期:2003-03-01 00:00:00
abstract::Contrast detection performance is known to be better for single component sinusoidal gratings than for sums of gratings at different orientations. A recent study Rovamo et al. (1994) (Investigative Ophthalmology and Visual Science, 35, 2611-2619) showed that spatial integration is less effective for multiple orientati...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(96)00233-7
更新日期:1997-04-01 00:00:00
abstract::The ability to rapidly and accurately recognize visual stimuli represents a significant computational challenge. Yet, despite such complexity, the primate brain manages this task effortlessly. How it does so remains largely a mystery. The study of visual perception and object recognition was once limited to investigat...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2010.10.002
更新日期:2011-04-13 00:00:00
abstract::In the ultimate stage of the Adelson-Bergen motion energy model [Adelson, E. H., & Bergen, J. (1985). Spatiotemporal energy models for the perception of motion. Journal of the Optical Society of America, 2, 284-299], motion is derived from the difference between directionally opponent energies E(L) and E(R). However, ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2004.10.018
更新日期:2005-04-01 00:00:00
abstract::There is evidence that humans implicitly learn an average or prototype of previously studied faces, as the unseen face prototype is falsely recognized as having been learned (Solso & McCarthy, 1981). Here we investigated the extent and nature of face prototype formation where observers' memory was tested after they st...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.02.002
更新日期:2013-04-19 00:00:00
abstract::Existing models for the generation of saccades predict fixed trajectories between start and landing positions of saccades. Experimental data show that saccades have rather variable trajectories. The objective of the present research is to quantify the variability in trajectories of binocular saccades and to test in ho...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(95)00077-r
更新日期:1995-12-01 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::Recent research has shown that reading disabled children find it unusually difficult to detect flickering or moving visual stimuli, consistent with impaired processing in the magnocellular visual stream. Yet, it remains controversial to suggest that reduced visual sensitivity of this kind might affect children's readi...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00199-5
更新日期:1998-02-01 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
abstract::The aim of the study was to determine the age-dependence of the accommodative force on the lens in order to make it clear whether the causes of presbyopia are due to lenticular or extralenticular changes. A finite element model of the lens of an 11-, 29- and 45-year-old human eye was constructed to represent the fully...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2007.10.017
更新日期:2008-01-01 00:00:00
abstract::Two mechanisms, one for the detection of fast, and the other for slow movement of a sinusoidal grating are identified, and investigated under central, parafoveal, and peripheral viewing conditions. The fast movement data is considered in terms of the Reichardt model, in which signals from two adjacent inputs are cross...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90138-4
更新日期:1983-01-01 00:00:00
abstract::The red, green, yellow, and blue curve portions of chromatic valence functions (CVFs) were measured by an iso-cancellation technique using three or four different chromatic standards (cancellation stimuli of fixed intensity and chromaticity) for each of the four curve portions. Curve shapes of the red, green, and yell...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(89)90070-9
更新日期:1989-01-01 00:00:00
abstract::Age-related maculopathy (ARM) remains a poorly understood degeneration. To discover new pathways using contemporary genomics, proteomics, and immunohistochemistry, validate emerging animal models, and validate new imaging modalities, human tissues obtained from donor eyes will be essential to ARM research for the fore...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2005.07.038
更新日期:2005-12-01 00:00:00
abstract::We have examined the ability of observers to determine the direction of movement of a variety of colored plaid patterns. When the two plaid components are of unequal spatial frequency or of unequal luminance or chromatic contrast, observers judge the direction of movement incorrectly. These errors are correlated with ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(92)90182-i
更新日期:1992-04-01 00:00:00
abstract::It has been suggested that schizophrenia is associated with a magnocellular deficit. This would predict a loss of contrast sensitivity at low spatial and/or at high temporal frequencies. We here review research that tested contrast sensitivity in individuals with schizophrenia. We find that the results of this researc...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2007.07.016
更新日期:2007-10-01 00:00:00
abstract::The transient system deficit hypothesis (TSDH) of specific reading disability [Percept. Psychophys. 40 (1986) 440] remains contentious. As part of a study examining multiple measures of transient and sustained system function, heterochromatic flicker matching (HFM) and brightness matching (HBM) were assessed in 30 poo...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2003.09.002
更新日期:2004-01-01 00:00:00
abstract::We investigated the influence of the Stiles-Crawford effect (SCE) of the first kind on the contrast sensitivity function using the apodisation model of the SCE. The SCE was measured for the right eyes of two subjects using an increment threshold technique involving a two-channel Maxwellian-viewing system. Filters made...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(02)00084-6
更新日期:2002-06-01 00:00:00
abstract::Superfusion with 200 microM 2-amino-4-phosphonobutyrate (APB) of dark and chromatically adapted frog eyecups caused marked potentiation of the ERG OFF-response (d-wave). Blockade of the glycinergic synapses by strychnine did not change this effect at all. Blockade of the GABAergic synapses by picrotoxin slightly dimin...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)00310-i
更新日期:1995-07-01 00:00:00
abstract::Researchers have investigated whether attentional capture during visual search is driven by top-down processes, i.e. experimental goals and directives, or by bottom-up processes, i.e. the properties of the items within a search display. Some research has demonstrated that subjects cannot avoid attending to a task-irre...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.01.005
更新日期:2013-03-22 00:00:00
abstract::To investigate the sources of spatial error in memory-guided saccades (MGS), we have trained monkeys on two different tasks: a MGS task and a delayed spatial match-to-sample (MTS) task. We first tested the effect of introducing a post-saccadic visual feedback on the accuracy of MGS. We found that visual feedback had a...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(02)00418-2
更新日期:2003-02-01 00:00:00
abstract::The role of the perceptual organization of the visual display on eye movement control was examined in two experiments using a task where a two-saccade sequence was directed toward either a single elongated object or three separate shorter objects. In the first experiment, we examined the consequences for the second sa...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2005.11.034
更新日期:2006-07-01 00:00:00
abstract::Velocity matching using the method of Constant Stimuli shows that perceived velocity varies with contrast [Thompson, P. (1982). Perceived rate of movement depends upon contrast. Vision Research, 22, 377-380]. Random contrast jitter would therefore be expected to increase the slopes of psychometric functions, and thus ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(99)00103-0
更新日期:1999-11-01 00:00:00
abstract::Recent work (Shimojo, Silverman & Nakayama, 1989; Vision Research, 29, 619-626) suggests that the visual system must discriminate between extrinsic boundaries (boundaries created by front occluding surfaces) and intrinsic boundaries (real object boundaries) in order to recognize objects and that this would importantly...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(91)90191-7
更新日期:1991-01-01 00:00:00
abstract::The perceived relative position of a moving object is frequently shifted as compared to the relative position of the object in the real world. The illusions have traditionally been explained by temporal models that influence the perceptual latency of visual objects. However, another compelling theory has recently been...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2010.09.021
更新日期:2010-11-23 00:00:00
abstract::Qualitative defects and resistances in 94 used gold foil electrodes were examined. The electrodes were divided into four groups of varying resistances and gold coating defects. Ten were randomly selected from each group to measure standard photopic electroretinograms (ERGs) in a normal subject. Ten new electrodes were...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(95)00046-3
更新日期:1995-10-01 00:00:00
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 modulati...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)00304-1
更新日期:1995-08-01 00:00:00