Chapter Three Sensation and Perception

Chapter Three Sensation and Perception - Chapter Three...

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Unformatted text preview: Chapter Three: Sensation and Perception “Nothing is in the intellect that wasn’t first in the senses.”- John Locke Sensation: a process by which our sensory receptors and nervous system receive and represent stimulus energy. Perception: a process of organizing and interpreting sensory info, enabling us to recognize meaningful objects and events. Bottom Up Processing: analysis that begins with the sense receptors and works up to the brains integration of sensory info. Top Down Processing: information processing guided by higher- level mental processes. As when we construct perceptions drawing on our experience and expectations. Psychophysics: study of the relationship between physical characteristics of stimuli and our psychological experience of them. Examples: Light: brightness Sound: volume Pressure: weight Taste: sweetness Absolute Threshold: minimum stimulation needed to detect a particular stimulus 50% of the time. Difference Threshold (just noticeable difference- just noticeable difference): minimum difference a person can detect between any two stimuli 50% of the time. Sensation: Thresholds continued Subliminal: when stimuli are below one’s absolute threshold for conscious awareness. Weber’s Law: to perceive as different, two stimuli must differ by a constant minimum percentage.-light intensity- 8%-weight- 2%-tone frequency- 0.3% Sensory Adaptation: diminished sensitivity as a consequence of constant stimulation. Wavelength: the distance from the peak of one wave… got to look it up he went to fast Intensity: amount of energy in a wave… got to look it up he went to fast Eye Shit: light first hits your cornea. Then sent through your pupil, iris is what color your eye is....
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This note was uploaded on 02/27/2008 for the course PHIL 1000 taught by Professor Davidgilliam during the Fall '06 term at N. Colorado.

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Chapter Three Sensation and Perception - Chapter Three...

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