Rod-cone based color vision in seals under photopic conditions.

abstract：:Similarity ratings were obtained to determine the minimum number of Gabor components that would produce a comparison texture that appeared preattentively similar to a 64-component standard texture. All textures were chosen to be both specifiable by a relatively small number of localized spectral components and suffici...

journal_title：Vision research

authors： Geri GA,Lyon DR,Zeevi Y

更新日期：1995-02-01 00:00:00

abstract：:A wide range of rest/stimulus cycle durations (40-360 sec) is reported to have been used by various groups for MRI neuroactivation studies of the visual cortex. In this paper we demonstrate a clear habituation-like response for longer cycle durations which results in a halving of apparent activation between cycle dura...

journal_title：Vision research

authors： Condon B,McFadzean R,Hadley DM,Bradnam MS,Shahani U

更新日期：1997-05-01 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

authors： Georgeson MA,Turner RS

更新日期：1984-01-01 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

authors： Demirel S,Anderson RS,Dakin SC,Thibos LN

更新日期：2012-04-15 00:00:00

abstract：:Presentation of different images to the two eyes normally results in a time-varying alternation between the two images (binocular rivalry). However, we find that when orthogonal gratings are viewed dichoptically at low contrast, a stable summation between the two images is perceived in the form of a dichoptic plaid. T...

journal_title：Vision research

authors： Liu L,Tyler CW,Schor CM

更新日期：1992-08-01 00:00:00

abstract：:This article describes a nonlinear model of neural processing in the vertebrate retina, comprising model photoreceptors, model push-pull bipolar cells, and model ganglion cells. Previous analyses and simulations have shown that with a choice of parameters that mimics beta cells, the model exhibits X-like linear spatia...

journal_title：Vision research

authors： Gaudiano P

更新日期：1994-07-01 00:00:00

abstract：:Two uncorrelated random dot patterns were superimposed and alternated to produce dynamic incoherent noise. When a low spatial frequency sine wave grating was optically superimposed on this noise and moved in step with the alternation of the two frames, the incoherent motion was masked and all the dots were seen to adh...

journal_title：Vision research

authors： Ramachandran VS,Cavanagh P

更新日期：1987-01-01 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：: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

authors： Narasimhan S,Giaschi D

更新日期：2012-06-01 00:00:00

abstract：:We compared sensitivity to first-order versus second-order local motion in patients treated for dense central congenital cataracts in one or both eyes. Amplitude modulation thresholds were measured for discriminating the direction of motion of luminance-modulated (first-order) and contrast modulated (second-order) hor...

journal_title：Vision research

authors： Ellemberg D,Lewis TL,Defina N,Maurer D,Brent HP,Guillemot JP,Lepore F

更新日期：2005-10-01 00:00:00

abstract：:The grasshopper Phlaeoba sp. has ocular filters that are arranged in discrete retinal bands. These filters modify the spectra of some of its photoreceptors, all of which are apparently filled with the same resident photopigment. The receptor response differences produced by the ocular filters provide a potential basis...

journal_title：Vision research

authors： Wasserman GS,Kong KL

更新日期：1982-01-01 00:00:00

abstract：:Subjects rated the strength of linear and rotary motion aftereffects (MAEs) on an eleven point scale. Inspection durations ranged from 30 to 180 sec in 30 sec steps. In Expt 1, trials using a single inspection duration were spaced at least 22 hr apart to minimize the possibility of interactions between adapting stimul...

journal_title：Vision research

authors： Hershenson M

更新日期：1993-09-01 00:00:00

abstract：:The attentional mechanisms in the brain responsible for fast pop-out search and slower difficult search have been shown to interact. Even if pop-out search is interrupted, by the addition of extra distractors to an initially simple search display, the partial computations calculated by the mechanisms responsible for p...

journal_title：Vision research

authors： Olds ES,Punambolam RJ

更新日期：2002-03-01 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

authors： Sharpe LT,Fach C,Nordby K

更新日期：1988-01-01 00:00:00

abstract：:The present study examines the landing-site distributions of the eyes during natural reading of Japanese script: a script that mixes three different writing systems (Kanji, Hiragana, and Katakana) and that misses regular spacing between words. The results show a clear preference of the eyes to land at the beginning ra...

journal_title：Vision research

authors： Kajii N,Nazir TA,Osaka N

更新日期：2001-09-01 00:00:00

abstract：:The induced size effect is an apparent rotation about a vertical axis that results from binocularly viewing a target in which one half-image is vertically magnified. A previous paper (Arditi et al., 1981, Vision Res. 21, 755-764) described a theory of this effect in terms of horizontal disparities that exist between v...

journal_title：Vision research

authors： Arditi A

更新日期：1982-01-01 00:00:00

abstract：:When a visual stimulus is displaced during a saccade the displacement is often not noticed unless it is large compared to the amplitude of the eye movement. Displacement detection is improved, however, if a blank intervenes between saccade target offset and the presentation of the displaced post-saccadic stimulus. Thi...

journal_title：Vision research

authors： Irwin DE,Robinson MM

更新日期：2018-01-01 00:00:00

abstract：:Many models of visual performance predict image discriminability, the visibility of the difference between a pair of images. We compared the ability of three image discrimination models to predict the detectability of objects embedded in natural backgrounds. The three models were: a multiple channel Cortex transform m...

journal_title：Vision research

authors： Rohaly AM,Ahumada AJ Jr,Watson AB

更新日期：1997-12-01 00:00:00

abstract：:Visual search for a colour target in distractors of two other colours is dramatically affected by the configuration of the colours in CIE (x, y) space. To a first approximation, search is difficult when a target's chromaticity falls directly between (i.e. is not linearly separable from) two distractor chromaticities, ...

journal_title：Vision research

authors： Bauer B,Jolicoeur P,Cowan WB

更新日期：1999-08-01 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

authors： Simmers AJ,Ledgeway T,Hess RF,McGraw PV

更新日期：2003-03-01 00:00:00

abstract：:The capacity of 1- and 2-month-old infants to make a tritan discrimination between a 4 degree, 416 nm test field and a 547 nm surround was tested by means of the forced-choice preferential looking technique. Most of the 2-month-olds and the other 1-month-olds made the tritan discrimination and must therefore have func...

journal_title：Vision research

authors： Varner D,Cook JE,Schneck ME,McDonald MA,Teller DY

更新日期：1985-01-01 00:00:00

abstract：:Collinear flankers increase the reports of the target present, an effect attributed to excitatory activation induced by the flankers on the target location, which consequently induces the filling-in effect (Polat & Sagi, 2007). Repetitive transcranial magnetic stimulation (rTMS) is a powerful tool for non-invasive inv...

journal_title：Vision research

authors： Amiaz R,Zomet A,Polat U

更新日期：2011-09-15 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

authors： Atchison DA,Scott DH

更新日期：2002-06-01 00:00:00

abstract：:In contour integration, increased difficulty in detection and shape discrimination of a chain of parallel elements (a ladder contour) compared to collinear elements (a snake contour) suggests more extensive processing of ladders than of snakes. In addition, conceptual similarities between ladders and textures - which ...

journal_title：Vision research

authors： Schmidt F,Vancleef K

更新日期：2016-09-01 00:00:00

abstract：:Experiments were performed to evaluate the spatial summation areas of the u.v.-, blue-, green- and red-sensitive cone mechanisms of goldfish. All the cone mechanisms were in compliance of Ricco's law, summing target radiance linearly over a certain range of target diameters with an average slope of 2.4. The critical d...

journal_title：Vision research

authors： Hawryshyn CW

更新日期：1991-01-01 00:00:00

abstract：:It is well known how early visual experience is critical for the development of multisensory processing abilities, and for this reason an early vision impairment could hinder the transfer of different sensory information during the exploration and recognition of the surrounding environment. Recently, we verified that ...

journal_title：Vision research

authors： Purpura G,Febbrini Del Magro E,Caputo R,Cioni G,Tinelli F

更新日期：2021-01-01 00:00:00

abstract：:After viewing directional motion, one is likely to perceive a subsequently presented directionally ambiguous motion as being in the same direction as the prior motion. The perceptual bias towards the most recent percept gradually develops as the interval between the prior stimulus and a subsequent test becomes longer....

journal_title：Vision research

authors： Kanai R,Knapen TH,van Ee R,Verstraten FA

更新日期：2007-09-01 00:00:00

abstract：:The intention of this series of experiments was to determine the extent to which the pathways sensitive to first-order and second-order motion are independent of one another at, and above, the level of global motion integration. We used translational, radial and rotational motion stimuli containing luminance-modulated...

journal_title：Vision research

authors： Aaen-Stockdale C,Ledgeway T,McGraw P,Hess RF

更新日期：2012-09-01 00:00:00

abstract：:Dopaminergic and indoleamine accumulating neurons can be demonstrated both in the light and the electron microscopes. Considerable differences have been found between different animal species. There are two types of dopaminergic neurons, the interamacrine cells and the interplexiform cells. The interamacrine cells con...

journal_title：Vision research

authors： Ehinger B

更新日期：1983-01-01 00:00:00

abstract：:An individual line or a combination of lines viewed in darkness has a large influence on the elevation to which an observer sets a target so that it is perceived to lie at eye level (VPEL). These influences are systematically related to the orientation of pitched-from-vertical lines on pitched plane(s) and to the leng...

journal_title：Vision research

authors： Matin L,Li W

更新日期：2001-10-01 00:00:00