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9 Cards in this Set

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Sensation
Is the taste, touch, sound, smell, or look of an object. It is the information that is carried to our CNS
Perception
the process of interpreting these sensations into meaningful characteristics
Rods
Receptor cells in teh retina, located mainly around the sides, that transduce light energy into neural messages; these visual receptors are highly sensitive and are active in dim light
Cones
Receptor cells in the central portion of the retina that transduce light energy into neural messages; they operate best when light levels are high, and they are primarily responsible for the ability to sense color
Trichromatic theory
Theory of color vision proposing that color information is extracted by comparing the relative activations of three different types of cone receptors
Opponent process theory
Theory of color vision proposing that cells in the visual pathway increase their activation levels to one color and decrease their activation levels to another color- for example, increasing to red and decreasing to green
Top down processing
Processing that is controlled by one's beliefs and expectations about how the world is organized
Bottom Up
Processing that is controlled by the physical message delivered to the senses
Gestalt principles of organization
The organizing principles of perception that include the laws of proximity, similarity, closure, continuation, and common fate