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8 Cards in this Set

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Through what steps might sophisticated eyes like ours have evolved from primative beginnings?
-early organisms developed eye spots that were photo receptors that formed organs that detected light

- Eye spots caved in to reduce glare and to increase the ability to detect movement in other animals
-the pits developed a transparent membrane to protect themselves from debris

- the membranne then developed a lens to magnify light which allowed it to turn into being able to project an image onto the photreceptors
What is the chemical basis for light and dark adaptation, ands why do we see mostly with cones in bright light and with rods in dim light?

What is the chemical basis for light and dark adaptation?
-Dark adaptation is the gradual increase of sensitivty to your eyes when you walk into a dark room

- light adaptation is the gradual decrease of sensitivity when you walk into a light room or the sunlight

-pupils dialate during dark adaptation to let more light in while during light adaptation the pupils constrict
What is the chemical basis for light and dark adaptation, ands why do we see mostly with cones in bright light and with rods in dim light?

why do we see mostly with cones in bright light
-rods are specialized in seeing dim light while cones are specialized in seeing bright light

- rhodopsin is more sensitive than cone photochemicals so when beright light rhodopsin brejas down the rods become non fuctional causing you to see with your cones
how does the trichromatic theory explain the three-primaries law? How was the theory validated by the discovery of the three cone types?

What is the trichromatic theory?
color emerges from the combination of the activity of 3 different kids of receptors that each sre sensitive to a different range of wavelengths
how does the trichromatic theory explain the three-primaries law? How was the theory validated by the discovery of the three cone types?

how does the trichromatic theory explain the three-primaries law?
Young and Heimowitz thought that if every color that we are able to see is because ofr the unique proportion of rastio of the three types of receptors then the three primaries law would be a result
how does the trichromatic theory explain the three-primaries law? How was the theory validated by the discovery of the three cone types?
How was the theory validated by the discovery of the three cone types?
-three types of cones do exist in the human retina which have different photochemicals that makes it most sensitive ti light within a particular band of wavelenths
What is the difference between parallel processing and serial processing, and what roles do they play in Treisman's feature-intergration theory?

What is the difference between parallel processing and serial processing?
Parallel processing od percieving a stimulus instantly and simultaniously
How might the unconcious asessment of depth provide a basis for the Ponzo, Muller Lyer, and moon illusions?
-the depth porcessing theory says that objectsin illusions can be can appeare larger than other because of distance cues