Dichromats detect colour-camouflaged objects that are not detected by trichromats

@article{Morgan1992DichromatsDC,
  title={Dichromats detect colour-camouflaged objects that are not detected by trichromats},
  author={M. J. Morgan and A Adam and John D. Mollon},
  journal={Proceedings of the Royal Society of London. Series B: Biological Sciences},
  year={1992},
  volume={248},
  pages={291 - 295}
}
To explain the surprisingly high frequency of congenital red–green colour blindness, the suggestion has been made that dichromats might be at an advantage in breaking certain kinds of colour camouflage. We have compared the performance of dichromats and normal observers in a task in which texture is camouflaged by colour. The texture elements in a target area differed in either orientation or size from the background elements. In one condition, the texture elements were all of the same colour… Expand
Advantage of Dichromats over Trichromats in Discrimination of Color-Camouflaged Stimuli in Humans
TLDR
Results suggest that participants with color-vision deficiency may have a superior visual ability to discriminate the color-camouflaged stimuli. Expand
Advantage of dichromats over trichromats in discrimination of color‐camouflaged stimuli in nonhuman primates
TLDR
It is demonstrated that dichromatic nonhuman primates possess a superior visual ability to discriminate color‐camouflaged stimuli, and that such an ability may confer selective advantages with respect to the detection of cryptic foods and/or predators. Expand
Color Perception in Protanomalous Female Macaca fascicularis
TLDR
The experiments show that protanomalous macaques can break color camouflage, similar to dichromats, and can discriminate colors similarly to trichromats. Expand
Experimental evidence that primate trichromacy is well suited for detecting primate social colour signals
TLDR
It is suggested that primate trichromatic colour vision confers excellent ability to detect meaningful variation in primate face colour, consistent with the hypothesis that social information detection has acted on either primate signal spectral reflectance or photoreceptor spectral tuning, or both. Expand
The colors of natural scenes benefit dichromats
TLDR
It was found that the number of pairs that could be discriminated by dichromats was almost 70% of those discriminated by normal trichromats, a proportion much higher than anticipated from estimates of discernible colors. Expand
Color vision test for dichromatic and trichromatic macaque monkeys.
TLDR
Comparison studies of color vision employing similar tests may be feasible to examine the difference in color behaviors between trichromatic and dichromatic individuals, although the genetic mechanisms of trichromeacy/dichromacy is quite different between new world monkeys and macaques. Expand
Dichromatic and Trichromatic Callithrix geoffroyi Differ in Relative Foraging Ability for Red-Green Color-Camouflaged and Non-camouflaged food
TLDR
There is no significant difference between dichromats and trichromats for either camouflaged or non-camouflaged Kix®, though the power in the tests is low because of high individual variation. Expand
Number of discernible colors for color-deficient observers estimated from the MacAdam limits.
TLDR
Complementary estimates obtained for the spectral locus of monochromatic stimuli suggest less impairment for color-deficient observers, a fact that is explained by the two-dimensional nature of the locus. Expand
Color discrimination, color constancy and natural scene statistics
Does the visual system allocate discriminative ability to different regions in colour space in a way that optimizes discrimination among natural colours? If so, discrimination should satisfy a " cubeExpand
Relative advantages of dichromatic and trichromatic color vision in camouflage breaking
TLDR
Online camouflage games reveal trichromats are better at finding birds and eggs than simulated dichromats, but dichromat can learn faster, and they learnt to capture eggs faster. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 17 REFERENCES
"Tho' she kneel'd in that place where they grew..." The uses and origins of primate colour vision.
  • J. Mollon
  • Biology, Medicine
  • The Journal of experimental biology
  • 1989
TLDR
It is argued that the colour vision of man and of the Old World monkeys depends on two subsystems that remain parallel and independent at early stages of the visual pathway, and that the New World monkeys have taken a different route to trichromacy. Expand
Variations of colour vision in a New World primate can be explained by polymorphism of retinal photopigments
TLDR
Good quantitative agreement was found when the microspectrophoto-metrically measured absorbance spectra were used to predict the behavioural sensitivity of individual animals to long wavelengths and suggests that the behavioural variation arises from variation in the retinal photopigments. Expand
Interference and dominance in texture segregation: Hue, geometric form, and line orientation
  • T. Callaghan
  • Mathematics, Medicine
  • Perception & psychophysics
  • 1989
TLDR
Findings support Beck’s (1982) model of textural segmentation and call into question traditional notions of the preattentive stage of perceptual processing. Expand
Contrast dependence and mechanisms of masking interactions among chromatic and luminance gratings.
TLDR
The spatial-frequency selectivity of the luminance-facilitates-color interaction is much broader than facilitatory interactions in either the color-color or Luminance-luminance conditions, which is consistent with models that invoke inhibitory or more elaborate excitatory masking interactions. Expand
Visual texture segregation based on orientation and hue
TLDR
The results clarify why different line orientations provide different effectiveness in texture segregation, and suggest that both interstimulus confusability and intrastimulus stability properties determine the ability of a dimension to interfere with, or to be interfered with by, another dimension in texturegregation. Expand
Inheritance of color vision in a New World monkey (Saimiri sciureus).
  • G. H. Jacobs, J. Neitz
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1987
TLDR
The results indicate that the inheritance of color vision in the squirrel monkey can be explained by assuming that the three middle- to long-wavelength cone pigments are specified by three alleles at a single locus on the X chromosome. Expand
Congenital and Acquired Colour Vision Defects
TLDR
This book is clearly written and easy to follow, but the wealth of detail and its wide scope may make much of it irrelevant to most clinicians. Expand
A feature-integration theory of attention
TLDR
A new hypothesis about the role of focused attention is proposed, which offers a new set of criteria for distinguishing separable from integral features and a new rationale for predicting which tasks will show attention limits and which will not. Expand
Molecular genetics of inherited variation in human color vision.
The hypothesis that red-green "color blindness" is caused by alterations in the genes encoding red and green visual pigments has been tested and shown to be correct. Genomic DNA's from 25 males withExpand
Unequal crossing over in the ribosomal DNA of Saccharomyces cerevisiae
TLDR
The frequency of unequal crossing over, as measured by the deletion or duplication of an inserted genetic marker (LEU2), is sufficient to maintain the sequence homogeneity of the rDNA repeat units. Expand
...
1
2
...