Orientation, masking, and vernier acuity for line targets.

abstract：:An outline drawing often serves as an excellent depiction of a visual scene. Somehow, our visual system can form two- and three-dimensional percepts solely from one-dimensional contour information. In mathematics, contour closure plays a key role in bridging this dimensional gap, however in perception the link between...

journal_title：Vision research

authors： Elder J,Zucker S

更新日期：1993-05-01 00:00:00

abstract：:High order aberrations have been suggested to play a role in determining the direction of accommodation. We have explored the effect of retinal blur induced by high order aberrations on dynamic accommodation by measuring the accommodative response to sinusoidal variations in accommodative demand (1-3D). The targets we...

journal_title：Vision research

authors： Gambra E,Wang Y,Yuan J,Kruger PB,Marcos S

更新日期：2010-09-15 00:00:00

abstract：:The change in sensitivity across some stimulus dimension which follows adaptation to a particular stimulus can reveal a great deal about the tuning characteristics of underlying sensory/perceptual mechanisms. In this study, a psychophysical adaptation paradigm was employed to characterize the disparity tuning of perce...

journal_title：Vision research

authors： Stevenson SB,Cormack LK,Schor CM,Tyler CW

更新日期：1992-09-01 00:00:00

abstract：:Following optic nerve crush in the adult lizard Ctenophorus ornatus, most retinal ganglion cells regrow their axons into visual brain centres: however, the regenerated projections lack retinotopic order and the animals are blind via the experimental eye. Here we have used 3H-thymidine autoradiography to demonstrate th...

journal_title：Vision research

authors： Beazley LD,Tennant M,Stewart TM,Anstee SD

更新日期：1998-03-01 00:00:00

abstract：:It was hypothesized that egg-laying Papilio butterflies could use polarizational colours as a cue to detect leaf orientation and to discriminate between shiny and matt leaves. These hypotheses would be supported if the following general questions were answered positively: (1) Can surface orientation be unambiguously c...

journal_title：Vision research

authors： Hegedüs R,Horváth G

更新日期：2004-01-01 00:00:00

abstract：:We recently reported a new motion illusion where dots in expanding random dot patterns appear to move faster than those in rotation patterns despite having the same physical speed distributions. In the current paper, we compared expansion and rotation motion to translational motion and found that the perceived dot spe...

journal_title：Vision research

authors： Geesaman BJ,Qian N

更新日期：1998-05-01 00:00:00

abstract：:Quantitative light microscopic techniques have been applied to photoreceptors, ganglion cells and dopaminergic amacrine cells in the retina of the North American opossum Didelphis virginiana. This marsupial has a retina with a central areal specialization where ganglion cells reach a maximum density of 2900/mm2 and co...

journal_title：Vision research

authors： Kolb H,Wang HH

更新日期：1985-01-01 00:00:00

abstract：:A technique of multi-input systems analysis is used to explore the field topography of ERG responses to local luminance modulation. Variations in amplitude and wave form are studied within the central 23 degrees. Outside the fovea, the amplitude appears to follow a simple power law rx as a function of eccentricity r w...

journal_title：Vision research

authors： Sutter EE,Tran D

更新日期：1992-03-01 00:00:00

abstract：:We investigated the perception of local surface orientation on a simple smooth object, under several different illumination conditions. The perceived local orientation was determined for several points on the surface and quantified as slant and tilt of the local tangent plane. We found an underestimation of the percei...

journal_title：Vision research

authors： Mamassian P,Kersten D

更新日期：1996-08-01 00:00:00

abstract：:To investigate the mechanisms of perceptual learning, we recently introduced a paradigm in which incorrect, reverse feedback followed after some but not all vernier presentations. This feedback paradigm exerted a strong effect on performance that seemed to bias decisions rather than to yield perceptual learning. Here,...

journal_title：Vision research

authors： Herzog MH,Ewald KR,Hermens F,Fahle M

更新日期：2006-10-01 00:00:00

abstract：:According to a top-down explanation of subliminal oculomotor capture, only subliminal distractors with a contrast polarity matching that of the searched-for targets should capture attention. For instance, when looking for white targets only subliminal white but not black distractors should capture attention. In contra...

journal_title：Vision research

authors： Weichselbaum H,Fuchs I,Ansorge U

更新日期：2014-07-01 00:00:00

abstract：:We compared the effectiveness of central and peripheral targets in a saccadic countermanding task. Stop-signal reaction times (SSRTs) do not differ significantly for central and peripheral stop signals. Further, when central and peripheral stop signals are presented together, SSRTs behave as expected of independent pr...

journal_title：Vision research

authors： Asrress KN,Carpenter RH

更新日期：2001-09-01 00:00:00

abstract：:We assess four common claims concerning the two-interval forced choice (2-IFC) procedure and the standard Difference Model of 2-IFC performance. The first two are (1) that it is unbiased and (2) that the structure of the 2-IFC task does not in itself alter sensitivity. The remaining two concern a claimed 2 enhancement...

journal_title：Vision research

authors： Yeshurun Y,Carrasco M,Maloney LT

更新日期：2008-08-01 00:00:00

abstract：:Foveal pathway visual function was assessed in 11 patients having tumours extending into the suprasellar region but without evidence of visual impairment as assessed by visual acuity and Bjerrum screen campimetry. Psychophysical and routine visual evoked potential (VEP) measurements were obtained from the eye ipsilate...

journal_title：Vision research

authors： Gutowski NJ,Heron JR,Scase MO

更新日期：1997-05-01 00:00:00

abstract：:We characterize the dark-adapted photoresponses from mouse cones intact in the isolated retina, their virtually natural environment, by isolating pharmacologically the photoreceptor light responses from the electroretinogram (ERG). Due to the different photoresponse kinetics and sensitivity of rods and cones, the cone...

journal_title：Vision research

authors： Heikkinen H,Nymark S,Koskelainen A

更新日期：2008-01-01 00:00:00

abstract：:Recent evidence points to the importance of global operations across spatial regions larger than individual cortical receptive fields. Studies of contour integration and motion trajectory detection suggest that network operations between local detectors underlie the encoding of extended contours in space and extended ...

journal_title：Vision research

authors： Hess RF,Ledgeway T,Dakin S

更新日期：2000-01-01 00:00:00

abstract：:A simulated field test was designed to determine whether the Holmes-Wright A lantern (HWA) is a valid color vision test for the rail industry. The simulation replicated viewing rail signal lights at 0.8 km distance under daylight conditions. Using the worst-normal as the maximum number of allowable errors on the simul...

journal_title：Vision research

authors： Hovis JK,Oliphant D

更新日期：1998-11-01 00:00:00

abstract：:Increment thresholds were measured over a range of adapting illuminances using a modified automated static perimeter. The data were fitted to a threshold versus intensity model (logT - logT(0) + log((A + A(0))/A(0))n) and the values logT(0) and logA(0) estimated. The effect of eccentricity and age on logT(0) and logA(...

journal_title：Vision research

authors： Herse P

更新日期：2005-02-01 00:00:00

abstract：:Any complete theory of human stereopsis must model not only how the correspondences between locations in the two views are determined and the depths are recovered from their disparity, but also how the ambiguity arising from such factors as noise, periodicity, and large regions of constant intensity are resolved and m...

journal_title：Vision research

authors： Ishikawa H,Geiger D

更新日期：2006-01-01 00:00:00

abstract：:The critical durations for temporal integration at threshold were obtained for lights of various wavelengths, presented both against darkness and against achromatic or chromatic backgrounds of different luminances. The critical duration (tc) was defined by a point of intersection of the two lines with the slopes of ze...

journal_title：Vision research

authors： Mitsuboshi M,Kawabata Y,Aiba TS

更新日期：1987-01-01 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：:Properties of presumed mechanisms controlling photoreceptor alignments are partially defined. A phototropic mechanism normally dominates alignment, but do modest changes in orientations occur with dark patching? Here, new photopic Stiles-Crawford (SCE-I) determinations were made before patching (pre-patch), just after...

journal_title：Vision research

authors： Kono M,Enoch JM,Strada E,Shih P,Srinivasan R,Lakshminarayanan V,Susilasate W,Graham A

更新日期：2001-01-01 00:00:00

abstract：:Bubbles is a classification image technique that randomly samples visual information from input stimuli to derive the diagnostic features that observers use in visual categorization tasks. To reach statistical significance, Bubbles performs an exhaustive and repetitive search in the stimulus space. To reduce the searc...

journal_title：Vision research

authors： Wang HF,Friel N,Gosselin F,Schyns PG

更新日期：2011-06-21 00:00:00

abstract：:Spatial interactions among orientation-tuned gain control processes are presumed to mediate center-surround contrast-contrast phenomena. In this paper, we assess contributions of gain control processes that pool over orientation. We measured the apparent contrast of a luminance-modulated center disk embedded in variou...

journal_title：Vision research

authors： Olzak LA,Laurinen PI

更新日期：1999-12-01 00:00:00

abstract：:The properties of small monochromatic targets as accommodative stimuli are not well understood. We used a dynamic optometer to record accommodation responses to monochromatic disc targets (1.0-27.3 min arc) and to a Maltese cross. Accommodation responded adequately to points as small as 13.6 min arc. The response to t...

journal_title：Vision research

authors： Kruger PB,Stark LR,Nguyen HN

更新日期：2004-11-01 00:00:00

abstract：:Even at moderate speeds, moving objects stimulate many retinal photoreceptors within the integration time of the receptors, yet usually no motion blur is experienced. An elegant model for the elimination of motion blur was proposed by Anderson and van Essen [(1987) Proceedings of the National Academy of Science U.S.A....

journal_title：Vision research

authors： Fahle M

更新日期：1995-04-01 00:00:00

abstract：:In this study, we show that glutamate regulates the viability of cultured retinal cells upon transient glucose deprivation. At low concentrations (10-100 microM) glutamate decreased MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] reduction to about 50% of control and decreased intracellular ATP leve...

journal_title：Vision research

authors： Rego AC,Santos MS,Areias F,Proença T,Oliveira CR

更新日期：2001-03-01 00:00:00

abstract：:Infants (14-151 days) and adults were shown two-dimensional geometric forms or stimuli from a set of highly textured patterns. Their eye movements were recorded by an infrared corneal reflection eye movement recorder as they freely scanned the stimuli. For both infants and adults, linear relationships were found betwe...

journal_title：Vision research

authors： Hainline L,Turkel J,Abramov I,Lemerise E,Harris CM

更新日期：1984-01-01 00:00:00

abstract：:The perceived size of 'P' and 'p' is influenced by their vertical position relative to nearby letters. In the experiments reported here, we show that uppercase 'P' appears smallest when it is displaced downward toward the letter's lowercase position, whereas lowercase 'p' appears largest when it is near the uppercase ...

journal_title：Vision research

authors： Katz M,Pola J

更新日期：2000-01-01 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

authors： Delahunt PB,Brainard DH

更新日期：2000-01-01 00:00:00