title: Wavelength discrimination in the leopard frog: a reexamination.
abstract: A reexamination of wavelength discrimination using a 2-choice paradigm and both chromatic-chromatic and chromatic-achromatic stimulus pairs has reaffirmed the positive tendency of Rana pipiens to approach short wavelengths. In addition, a strong avoidance of long wavelengths was observed and an interaction of these two opposite response tendencies was demonstrated. Thus, the percent choice frequency for a short-wavelength stimulus depends upon the stimulus with which it is paired. A positive phototaxis appears to influence response to some short-wavelength stimuli when they differ in brightness from an achromatic stimulus, but not with wavelengths above 471 nm.
mesh_terms: D000818:Animals; D001001:Anura; D002755:Choice Behavior; D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests; D004192:Discrimination, Psychological; D004924:Escape Reaction; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D011894:Rana pipiens / Q000502:physiology*; D014796:Visual Perception