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Lecture

PSYCH 1XX3 Lecture Notes - Electromagnetic Spectrum, Psych, Human Factors And Ergonomics


Department
Psychology
Course Code
PSYCH 1XX3
Professor
Joe Kim

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Psych 1XX3 Live Lecture Colour Perception
Feb. 26/13
Visual spectrum is just a part of a continuum electromagnetic spectrum.
The visible spectrum visual stimulus that humans can see; we can only
see this small narrow range.
Bias: limits of visual detection shape your view of the world.
Bias: colour around you are just in your head.
Why is colour information important?
One frog blends in with it’s environment – camouflage; hide from
predators
One frog tries to look conspicuous, very colorful and can help scare away
predators frog secretes a poison that can kill or make predator very sick
and therefore the predator will be unlikely to attach this frog.
Adaptive Significance: foraging Hypothesis
These animals have better colour system and are better able to hunt for
food.
Cones are specialized photoreceptors.
Unique combined receptor activity produces distinct colour perception.
Blue: 420 nm
Green: 530 nm
Red: 560 nm
Because the colours are curved, they can respond to some other colour
stimuli.
Different cone types required to generate contrast at least 2
Trichromat would have a richer experience than a dichromat.
Colour perception abilities differ across species.
Photoreceptors converge into ganglion cells.
Colour perception can affect information processing for design and ergonomics.
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