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10 Cards in this Set
- Front
- Back
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Sensation |
The sense organs detection of external physical stimulus and the transmission of information about the stimulus to the brain. |
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Perception |
The processing, organization, and interpretation of sensory signals in the brain; these processes result in an internal neural representation of the physical stimulus. |
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Absolute threshold |
The smallest amount of physical stimulation required to detect a sensory and put half of the time it is present. |
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Difference threshold |
The minimum difference in physical stimulation required to detect a difference between sensory inputs. |
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Signal detection theory |
Detection of a faint stimulus requires a judgment-- it is not an all or none process |
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Sensory adaptation |
A decrease in sensitivity to a constant level of simulation. |
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Lens |
The adjustable, transparent structure behind the pupil; this structure focuses light on the retina, resulting in a crisp visual image. |
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Retina |
The thin inner surface of the back of the eyeball; the surface contains the sensory receptors. |
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Rods |
Sensory receptors in the retina that detect light wave and transduce them into signals that are processed in the brain as vision. Rods respond best to low levels of illumination and therefore do not support color vision or seeing fine detail. |
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Cones |
Sensors that the reason the retina that detect light waves and transduce them into signals that are processed in the brain as visions. Cones respond best to higher levels of illumination, and therefore they are responsible for seeing color and fine detail. |
