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Cards In This Set
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Sensation
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The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.
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Perception
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The process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.
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Bottom- Up Processing
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Analysis that begins with the sense receptors and works up to the brains integration of sensory information.
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Top- Down Processing
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Information processing guided by higher- level mental processes, as when we construct perceptions drawing on our experience and expectations.
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Psychophysics
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The study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them.
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Absolute Threshold
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The minimum stimulation needed to detect a particular stimulus 50% of the time
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Signal Detection Theory
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A theory prediction how and when we detect the presence of a faint stimulus "signal" amid background stimulation "noise".
-Assumes detection depends partly on a persons experience, expectations, motivation, and level of fatigue. |
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Subliminal
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Below one's absolute threshold for conscious awareness
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Difference Threshold
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The minimum difference between 2 stimuli required for detection 50% of the time. "noticeable difference".
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Weber's Law
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The principle that, to be perceived as different, 2 stimuli must differ by a constant minimum percentage.
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Sensory Adaptation
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Diminished sensitivity as a consequence of constant stimulation.
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Transduction
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Conversion of one form of energy in to another. In sensation, the transforming of stimulus energies in to neural impulses.
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Wavelength
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The distance from one wave peak to another
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Hue
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The dimension of color that is determined by the wavelength of light.
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Intensity
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The amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the waves amplitude.
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