Term
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Definition
| the level of sensory stimulation necessary for sensation to occur |
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Term
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Definition
| the gradual loss of attention to unneeded or unwanted sensory information |
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Term
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Definition
| the process of receiving information from the environment |
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Term
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Definition
| the process of assembling and organizing sensory information to make it meaningful |
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Term
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Definition
| light as it originates from the sun or a bulb before it is broken into different frequencies |
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Term
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Definition
| clear outer covering of the eye, behind which is a fluid |
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Term
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Definition
a colored circular muscle that opens and closes, forming larger and smaller circles to
control the amount of light getting into the eye |
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Term
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Definition
| the part of the eye that focuses an image on the retina |
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Term
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Definition
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Term
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Definition
| back of the eye which contains millions of receptors for light |
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Term
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Definition
the portion of the retina through which the optic nerve exits and where there
are not receptors for light waves |
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Term
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Definition
a visual receptor most sensitive to the violet-purple wavelengths; very sensitive for
night vision; “sees” only black and white |
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Term
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Definition
| a visual receptor that responds during daylight; “sees” color |
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Term
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Definition
| inability to perceive certain colors, such as red and green |
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Term
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Definition
image that remains after stimulation of the retina has ended. Cones not used
fire to bring the visual system back in balance. |
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Term
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Definition
| stimulation presented below the level of consciousness |
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Term
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Definition
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Term
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Definition
| how high or low a sound is |
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Term
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Definition
| the complexity of a sound |
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Term
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Definition
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Term
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Definition
| a measure of how loud a sound is (its intensity |
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Term
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Definition
| a piece of skin stretched over the entrance to the ear; vibrates to sound |
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Term
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Definition
a snail-shaped part of the ear, filled with fluid and small hairs that vibrate to
incoming sound |
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Term
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Definition
| receptor cells for hearing found in the cochlea |
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Term
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Definition
| hair-like extensions on cells |
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Term
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Definition
| bundle of nerves carrying sound to the brain |
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Term
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Definition
nerve receptors in the skin that respond to pressure, temperature, or
pain |
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Term
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Definition
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Term
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Definition
units that receive odor molecules and communicate their nature to the
brain |
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Term
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Definition
| odor chemicals that communicate a message |
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Term
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Definition
chemical receptors on the tongue that decode molecules of food or drink to
identify them |
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Term
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Definition
| the ability to retain the size of an object regardless of where it is located |
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Term
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Definition
the ability to perceive an object as the same color regardless of the
environment |
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Term
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Definition
the ability to keep an object’s brightness constant as the object is
moved to various environments |
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Term
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Definition
the ability to perceive an object as having the same shape regardless of
the angle at which it is seen |
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Term
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Definition
the ability to keep objects in the environment steady by perceiving either
ourselves or outside objects as moving |
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Term
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Definition
| the ability to see the relation of objects in space |
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Term
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Definition
| an apparatus used to demonstrate depth perception |
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Term
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Definition
the difference between the images provided by the two retinas. When the
images are brought together in the brain, they provide a sense of depth. |
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Term
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Definition
| how rough or smooth objects appear; used in depth perception |
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Term
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Definition
| an organized whole, shape, or form |
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Term
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Definition
| a perceptual cue that involves grouping like things together |
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Term
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Definition
a perceptual cue that involves grouping together things that are near one
another |
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Term
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Definition
| the process of filling in the missing details of what is viewed |
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Term
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Definition
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Term
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Definition
illusion in which one line in a picture with two equal-length lines
seems longer |
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Term
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Definition
illusion in which the same object is seen as two alternating figures—first
one, then the other |
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