منابع مشابه
Simultaneous Color Contrast in Goldfish— a Quantitative Study
A set of 9-15 colored test fields was presented to goldfish. In Experiment 1, test field hues ranged from green through yellow to red; in Experiment 2, the hues varied from blue through gray to yellow. In the training conditions, the test fields were presented with a gray or black surround. The fish learned to choose one intermediate test field hue by rewarding them with food. In the test condi...
متن کاملSimultaneous S-cone contrast
Chromatic induction is the change in appearance of one light caused by a second, nearby light. We measured chromatic induction in a central test viewed within an inducing field that was varied in only short-wavelength-sensitive (S) cone stimulation. The observer matched the appearance of the central test by adjusting the chromaticity of a haploscopically presented comparison field, seen by the ...
متن کاملEffects of mean luminance on goldfish temporal contrast sensitivity
The goldfish is an important animal model for retinal processing and for understanding the relationship between retinal structure and function. The purpose of this study was to examine the temporal processing of the visual system of this species. Goldfish were classically conditioned to suppress respiration upon presentation of a sinusoidally flickering stimulus. Temporal contrast sensitivity f...
متن کاملSimultaneous density contrast is bidirectional.
Simultaneous density contrast, or SDC, is the phenomenon in which the perceived density of a textured region is altered by a surround of different density (Mackay, 1973). SDC provides an experimental tool to investigate mechanisms of density coding, yet has not been systematically examined. We measured SDC with a 2AFC staircase procedure in which human observers judged which of two patterns, on...
متن کاملSimultaneous brightness contrast of foraging Papilio butterflies.
This study focuses on the sense of brightness in the foraging Japanese yellow swallowtail butterfly, Papilio xuthus. We presented two red discs of different intensity on a grey background to butterflies, and trained them to select one of the discs. They were successfully trained to select either a high intensity or a low intensity disc. The trained butterflies were tested on their ability to pe...
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ژورنال
عنوان ژورنال: Animal Learning & Behavior
سال: 1973
ISSN: 0090-4996,1532-5830
DOI: 10.3758/bf03214570