Visual pigments of African cichlid fishes: evidence for ultraviolet vision from microspectrophotometry and DNA sequences.

abstract：:Saccadic and manual responses were used to investigate the speed of discrimination between happy and non-happy facial expressions in two-alternative-forced-choice tasks. The minimum latencies of correct saccadic responses indicated that the earliest time point at which discrimination occurred ranged between 200 and 28...

journal_title：Vision research

authors： Calvo MG,Nummenmaa L

更新日期：2011-08-01 00:00:00

abstract：:Reduced perceptual span is one factor which limits reading speed in patients with macular disease. This study measured the perceptual span and the number of saccades to locate a target in 18 patients with macular disease and seven control subjects on two occasions separated by up to 12 months. Perceptual span changed ...

journal_title：Vision research

authors： Crossland MD,Rubin GS

更新日期：2006-02-01 00:00:00

abstract：UNLABELLED:Taurine transporter knockout mice show severe retinal degeneration at an early age. The study was designed to determine whether degeneration also takes place in the absence of light. Mice were maintained up to 6 weeks of age in cyclic lighting or in total darkness. Degeneration took place in both groups, but...

journal_title：Vision research

authors： Rascher K,Servos G,Berthold G,Hartwig HG,Warskulat U,Heller-Stilb B,Häussinger D

更新日期：2004-01-01 00:00:00

abstract：:Different scenes contain varying cues to the direction of gravity. Do scenes with stronger cues differentially affect the ability of a scene to influence the direction of the Subjective Visual Vertical (SVV) and the Perceptual Upright (PU)? Using indoor, outdoor, natural and man-made scenes we asked participants to ju...

journal_title：Vision research

authors： Haji-Khamneh B,Harris LR

更新日期：2010-08-06 00:00:00

abstract：:We describe a technique, involving the projection of low power laser beams through excised lenses in solution, that makes it possible to measure photographically lens optical aberrations. Preliminary work indicates that the laser method can be used in combination with lens culture experiments as a means of monitoring ...

journal_title：Vision research

authors： Sivak JG,Gershon D,Dovrat A,Weerheim J

更新日期：1986-01-01 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：:Models based on spatial-frequency channels and local features provide alternative explanations for suprathreshold pattern discrimination. We compared psychophysical discrimination data with the predictions of the Wilson and Gelb channel model and three local-feature models. The features were peak-valley local contrast...

journal_title：Vision research

authors： Akutsu H,Legge GE

更新日期：1995-10-01 00:00:00

abstract：:Three normal observers made visual matches from 0.03 to 100 td on a 10 degree central field at 445, 560 and 630 nm, using two different methods: heterochromatic flicker photometry and direct comparison brightness matching. In a relative sensitivity vs illuminance plot, the brightness matches underwent smooth changes, ...

journal_title：Vision research

authors： Vienot F,Chiron A

更新日期：1992-03-01 00:00:00

abstract：:The role of eye-muscle potentiation in adaptation to prismatic tilt was evaluated by assessing the presence of cyclotorsion induced by prolonged wearing of tilting prisms. Fundus photographs, containing the retinal image of the test line adjusted to the subjective vertical, were obtained before and after prism viewing...

journal_title：Vision research

authors： Mikaelian HH,Mikaelian DM,Cameron EL

更新日期：1990-01-01 00:00:00

abstract：:Outside the fovea, the visual system pools features of adjacent stimuli. Left or right of fixation the tilt of an almost horizontal Gabor pattern becomes difficult to classify when horizontal Gabors appear above and below it. Classification is even harder when flankers are to the left and right of the target. With all...

journal_title：Vision research

authors： Mareschal I,Morgan MJ,Solomon JA

更新日期：2010-04-07 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

authors： Meigen T,Prüfer R,Reime S,Friedrich A

更新日期：2005-10-01 00:00:00

abstract：:The changes with age in the accommodation responses to dynamic stimuli can reveal useful information on the factors underlying presbyopia development. Analysis of the monocular accommodation responses of 19 normal observers (ages 18-49 years) to stimuli whose vergence varied sinusoidally with time at different tempora...

journal_title：Vision research

authors： Heron G,Charman WN

更新日期：2004-12-01 00:00:00

abstract：:A recent study illustrating the importance of sensory influences on inhibition of return (IOR) found stimuli biased towards the parvocellular (P) pathway produced greater IOR while stimuli biased towards the magnocellular (M) pathway produced less IOR (Brown, 2009; Guenther & Brown, 2007). The present study used a dif...

journal_title：Vision research

authors： Guenther BA,Brown JM

更新日期：2012-05-01 00:00:00

abstract：:We evaluated the relative orientations of the displacement planes of the two eyes under various conditions: fixations of nearby targets, of far targets and targets presented dichoptically at optical infinity. We show that disparity driven vergence is not always required to rotate the primary positions. We find that ey...

journal_title：Vision research

authors： Bruno P,van den Berg AV

更新日期：1997-04-01 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

authors： Servos P,Olds ES,Planetta PJ,Keith Humphrey G

更新日期：2005-06-01 00:00:00

abstract：:A pincushion formed by four arcs on a gray background looks darker when the arcs are black, and lighter when the arcs are white. Yet, a matching-experiment shows that this difference is relative. Whereas the apparently darker pincushion requires a matching luminance that is lower than the background luminance (i.e. as...

journal_title：Vision research

authors： De Weert CM,Spillmann L

更新日期：1995-05-01 00:00:00

abstract：:We measured the temporal summation properties of paired flashes to investigate the temporal responses of the chromatic channel in peripheral vision in comparison with those of the luminance channel. The size of the stimulus was scaled according to the cortical magnification factor. The temporal response was biphasic t...

journal_title：Vision research

authors： Masuda O,Uchikawa K

更新日期：2009-03-01 00:00:00

abstract：:Sensitivity to the sudden displacement (phase shift) of a single monocularly presented sinusoidal grating is increased when a static grating of similar spatial frequency is presented to the same eye. If the static grating is presented to the other eye instead sensitivity is, at best, halved. This demonstration implies...

journal_title：Vision research

authors： Badcock DR,Derrington AM

更新日期：1987-01-01 00:00:00

abstract：:The dependence of spatial frequency on accommodation has been investigated extensively. Recently, differences between myopes and emmetropes with respect to accommodative microfluctuations for high spatial frequency targets have been reported. Considering the diversity of accommodative responses (ARs) to sinusoidal gra...

journal_title：Vision research

authors： Xu J,Zheng Z,Drobe B,Jiang J,Chen H

更新日期：2015-10-01 00:00:00

abstract：:How we attend to and search for objects in the real world is influenced by a host of low-level and higher-level factors whose interactions are poorly understood. The vast majority of studies approach this issue by experimentally controlling one or two factors in isolation, often under conditions with limited ecologica...

journal_title：Vision research

authors： Kovach CK,Adolphs R

更新日期：2015-11-01 00:00:00

abstract：:We studied the detectability of dichoptically presented vertical grating patterns that varied in the ratio of the contrasts presented to the two eyes. The resulting threshold data fall on a binocular summation contour well described by a power summation equation with an exponent near 2. We studied the effect of adding...

journal_title：Vision research

authors： Anderson PA,Movshon JA

更新日期：1989-01-01 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

authors： Bedell HE,Johnson CA

更新日期：1995-08-01 00:00:00

abstract：:Using a staircase method, the tilt aftereffect (TAE) was measured with test flashes of durations ranging from 10 to 600 msec. The TAE is largest with brief duration test stimuli and reaches an asymptotic value at a test flash duration of 200-300 msec. A series of control experiments rule out a variety of explanations ...

journal_title：Vision research

authors： Wolfe JM

更新日期：1984-01-01 00:00:00

abstract：:Perceptual learning (PL) has been traditionally thought of as highly specific to stimulus properties, task and retinotopic position. This view is being progressively challenged, with accumulating evidence that learning can generalize (transfer) across various parameters under certain conditions. For example, retinotop...

journal_title：Vision research

authors： Sotiropoulos G,Seitz AR,Seriès P

更新日期：2018-11-01 00:00:00

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 shor...

journal_title：Vision research

authors： Hübner R

更新日期：1996-11-01 00:00:00

abstract：:When a vernier stimulus is presented for a short time and followed by a grating comprising five straight lines, the vernier remains invisible but may bequeath its offset to the grating (feature inheritance). For more than seven grating elements, the vernier is rendered visible as a shine-through element. However, shin...

journal_title：Vision research

authors： Herzog MH,Fahle M,Koch C

更新日期：2001-08-01 00:00:00

abstract：:We recently reported that different purification methods of recombinant adeno-associated virus type 2 (rAAV2) affect the transduction characteristics following subretinal injection. In this study, we examined the roles of contaminant proteins from the HEK-293 cells and helper adenovirus, inactivation of helper adenovi...

journal_title：Vision research

authors： Shen WY,Lai YK,Lai CM,Rakoczy PE

更新日期：2004-02-01 00:00:00

abstract：:Non-Fourier motion is now commonplace in research on visual motion perception, yet lacks a computational framework. This paper examines this issue based on the observation that many non-Fourier motion stimuli have a simple characterization in the frequency domain, in terms of oriented power distributions that lie alon...

journal_title：Vision research

authors： Fleet DJ,Langley K

更新日期：1994-11-01 00:00:00

abstract：:The perception of blackness was investigated by measuring spectral efficiency and field additivity under conditions of temporal induction. For both purposes, observers foveally viewed a 0.75 deg, inducing stimulus for 5 sec followed immediately (or 200 msec later) by a broadband (5500 K) reference stimulus of the same...

journal_title：Vision research

authors： Volbrecht VJ,Werner JS

更新日期：1989-01-01 00:00:00

abstract：:The relative contributions of stimulus salience and task-related goals in guiding attention remain an issue of debate. Several studies have demonstrated that top-down factors play an important role, as they often override capture by salient irrelevant objects. However, Yantis and Egeth [Yantis, S., & Egeth, H. E. (199...

journal_title：Vision research

authors： Lamy D,Zoaris L

更新日期：2009-05-01 00:00:00