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Colour perception in a dichromat

Roth, Lina LU ; Balkenius, Anna LU and Kelber, Almut LU (2007) In Journal of Experimental Biology 210(16). p.2795-2800
Abstract
Most mammals have dichromatic colour vision based on

two different types of cones: a short-wavelength-sensitive

cone and a long-wavelength-sensitive cone. Comparing the

signal from two cone types gives rise to a one-dimensional

chromatic space when brightness is excluded. The so-called

‘neutral point’ refers to the wavelength that the animal

cannot distinguish from achromatic light such as white or

grey because it stimulates both cone types equally. The

question is: how do dichromats perceive their chromatic

space? Do they experience a continuous scale of colours or

does the neutral point divide their chromatic space into two colour categories, i.e.... (More)
Most mammals have dichromatic colour vision based on

two different types of cones: a short-wavelength-sensitive

cone and a long-wavelength-sensitive cone. Comparing the

signal from two cone types gives rise to a one-dimensional

chromatic space when brightness is excluded. The so-called

‘neutral point’ refers to the wavelength that the animal

cannot distinguish from achromatic light such as white or

grey because it stimulates both cone types equally. The

question is: how do dichromats perceive their chromatic

space? Do they experience a continuous scale of colours or

does the neutral point divide their chromatic space into two colour categories, i.e. into colours of either short or long wavelengths?

We trained horses to different colour combinations in a

two-choice behavioural experiment and tested their

responses to the training and test colours. The horses chose

colours according to their similarity/relationship to

rewarded and unrewarded training colours. There was no

evidence for a categorical boundary at the neutral point or

elsewhere.

This study suggests that dichromats perceive their

chromatic space as a continuous scale of colours, treating

the colour at the neutral point as any other colour they can distinguish. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
chromatic space., colour vision, horse, mammal, dichromat
in
Journal of Experimental Biology
volume
210
issue
16
pages
2795 - 2800
publisher
The Company of Biologists Ltd
external identifiers
  • wos:000249517200008
  • scopus:34548639250
ISSN
1477-9145
DOI
10.1242/jeb.007377
language
English
LU publication?
yes
id
51764be5-f8a9-49c2-93cf-ff58296666fe (old id 629111)
date added to LUP
2007-12-10 13:52:23
date last changed
2017-03-26 03:34:40
@article{51764be5-f8a9-49c2-93cf-ff58296666fe,
  abstract     = {Most mammals have dichromatic colour vision based on<br/><br>
two different types of cones: a short-wavelength-sensitive<br/><br>
cone and a long-wavelength-sensitive cone. Comparing the<br/><br>
signal from two cone types gives rise to a one-dimensional<br/><br>
chromatic space when brightness is excluded. The so-called<br/><br>
‘neutral point’ refers to the wavelength that the animal<br/><br>
cannot distinguish from achromatic light such as white or<br/><br>
grey because it stimulates both cone types equally. The<br/><br>
question is: how do dichromats perceive their chromatic<br/><br>
space? Do they experience a continuous scale of colours or<br/><br>
does the neutral point divide their chromatic space into two colour categories, i.e. into colours of either short or long wavelengths?<br/><br>
We trained horses to different colour combinations in a<br/><br>
two-choice behavioural experiment and tested their<br/><br>
responses to the training and test colours. The horses chose<br/><br>
colours according to their similarity/relationship to<br/><br>
rewarded and unrewarded training colours. There was no<br/><br>
evidence for a categorical boundary at the neutral point or<br/><br>
elsewhere.<br/><br>
This study suggests that dichromats perceive their<br/><br>
chromatic space as a continuous scale of colours, treating<br/><br>
the colour at the neutral point as any other colour they can distinguish.},
  author       = {Roth, Lina and Balkenius, Anna and Kelber, Almut},
  issn         = {1477-9145},
  keyword      = {chromatic space.,colour vision,horse,mammal,dichromat},
  language     = {eng},
  number       = {16},
  pages        = {2795--2800},
  publisher    = {The Company of Biologists Ltd},
  series       = {Journal of Experimental Biology},
  title        = {Colour perception in a dichromat},
  url          = {http://dx.doi.org/10.1242/jeb.007377},
  volume       = {210},
  year         = {2007},
}