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Author Topic: Looking for an old post on colour vision  (Read 1228 times)

Offline cheryl j

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Looking for an old post on colour vision
« on: 07/02/2013 22:49:16 »
I tried searching it, but I'm looking for an old post where someone answered the question "is what one person calls yellow the same sensory experience as what another person calls yellow?" It was a very good explanation, and I've never read it any where else. Thanks.


 

Offline RD

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Re: Looking for an old post on colour vision
« Reply #1 on: 07/02/2013 23:27:44 »
Quote from: thenakedscientists
Do we all see colours as the same? Sun, 13th Sep 2009

Kat -  "I think we had someone on a while ago who was talking about the science of vision and basically the red I see is not the same as the red you see.  Itís because the frequency maybe the same but it really depends how the brain interprets it."
http://www.thenakedscientists.com/HTML/questions/question/2404/

I suspect it's the "someone" they "had on a while ago" you are looking for.
 

Offline evan_au

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Re: Looking for an old post on colour vision
« Reply #2 on: 08/02/2013 20:37:43 »
We now know that some people see colours differently, because we have found some human tetrachromats.

http://www.radiolab.org/2012/may/21/perfect-yellow/
also http://www.radiolab.org/2012/may/21/

(Originally posted in http://www.thenakedscientists.com/forum/index.php?topic=46714.0)
 

Offline cheryl j

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Re: Looking for an old post on colour vision
« Reply #3 on: 09/02/2013 04:07:49 »
Thanks, but that's not it. Maybe the person who wrote it will notice this.
 

Offline CliffordK

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Re: Looking for an old post on colour vision
« Reply #4 on: 09/02/2013 10:58:24 »
Here are a few more links:
What colour is that really?
Do we all see colours the same way?
Do we all see the same colours ?
Is what I call "blue" the same thing as the colour that you call "blue"?
colour...how do we see it?
What Is The Visual Difference Between The Electromagnetic Spectrum?
Are there colors we arenít seeing?

Some also have embedded links.

Psychologically speaking, one may not always be certain whether what one person experiences as yellow is the same as what another experiences as yellow.  I believe this may have been even considered by Plato and Aristotle, although I can't remember the exact story.

As mentioned, there are people who are monochromats, dichromats, trichromats, or perhaps even tetrachromats.  So, someone who is missing one or more types of cones may still perceive yellow, but could truly perceive it differently than other people. 

People also have color preferences.  So one person might say Red is their favorite color, and another may prefer Purple or Pink.  People may well have different experiences when seeing a color based on color preferences, or even color associations. 

Another question might be "what is yellow"?  Light with a wavelength around 580 nanometers will give a person yellow.  However, as mentioned, most people have 3 cones.  Anything that would activate the 3 cones in the same manner would be indistinguishable from true yellow.

In fact, consider your basic RGB computer monitor.  RGB?  Red, Green, Blue.  Where is the YELLOW?  The concept dates back at least to the French impressionists (at least) who realized that mixing lights and mixing paints was different.  And, they could create their color palate by painting with small dots of their selected primary colors.  Who would have predicted that such a concept would be vital for computers a century later.
 

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Re: Looking for an old post on colour vision
« Reply #4 on: 09/02/2013 10:58:24 »

 

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