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20 Cards in this Set
- Front
- Back
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Sensation |
Process of sensory receptors and nervous system recieve and represent stimulus energies from enviroment. |
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Perception |
Process of organizing and interpreting sensory info. Recognizing meaningful objects and events. |
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Bottom up processing |
Start at sensory receptors, receive sensory input, and works up to a higher level of processing and expectations. |
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Top down processing |
Creates meaning from sensory input by drawing on experience and expectations. |
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Three steps of basic sensory system |
Receive sensory stimulation, transform simulation,deliver neural info. |
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Transduction |
Conversion of one form of energy into another. Sound, smell, sight into neural impulses to the brain. |
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Absolute threshold |
Minimum stimulus energy needed to detect particular stimulus 50% of the time. |
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Gustav Fechner |
German scientist, studied absolute threshold |
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Signal detection theory |
Predicting how and when detecting presence of faint stimulus. |
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Subliminal |
Below ones absolute threshold for consciousness awareness. |
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Priming |
Activation, often unconsciously, certain association, predisposing ones perception, memory, or response. |
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Difference threshold |
Minimum difference between two stimuli, requires detection 50% of the time. |
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Weber's Law |
Principle, perceived as different, two stimuli must differ by a constant minimum percentage. |
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Sensory adaption |
Diminished sensitivity as a consequence of constant stimulation. |
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Perceptual set |
Mental predisposition to precieve one thing and not another. |
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Rods |
Light and dark sensing, food for seeing low levels of light and movement, stop responding if exposed to light. |
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Cone |
Responds best in light, color vision sensors, greater acuity, primarily not fovea. |
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Fovea |
Area of the retina with greatest visual acuity, densely packed area mostly cones. |
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Blind spot |
Portion of the retina that contains no rods or cones, optical nerve leaves the eye to travel to the brain. |
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Relative luminance |
Color perception, both light object and surrounding context. |
