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sensation_and_perception - Sensation and Perception...

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Sensation and Perception Sensation *Sensation *a process by which our sensory receptors and nervous system receive and represent stimulus energy from the outside world *Perception *a process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events Sensation *Bottom-Up Processing *analysis that begins with the sense receptors and works up to the brain’s integration of sensory information *Top-Down Processing *information processing guided by higher-level mental processes *as when we construct perceptions drawing on our experience and expectations Bottom-up and Top-down processing at work *Our sensory and perceptual processes work together to help us sort out complex processes Sensation - Basic Principles *Psychophysics *study of the relationship between physical characteristics of stimuli and our psychological experience of them *Light- brightness *Sound- volume *Pressure- weight *Taste- sweetness Sensation - Thresholds *Absolute Threshold *minimum stimulation needed to detect a particular stimulus 50% of the time *Difference Threshold *minimum difference between two stimuli required for detection 50% of the time *just noticeable difference (JND) Sensation - Thresholds *Subliminal *When stimuli are below one’s absolute threshold for conscious awareness Sensation - Thresholds *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
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Vision - Stabilized Images on the Retina Vision *Wavelength *the distance from the peak of one wave to the peak of the next *Hue *dimension of color determined by wavelength of light *Intensity *amount of energy in a wave determined by
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  • Fall '10
  • KerriHogue
  • Psychology, Perceptual Organization- Size-Distance Relationship Perceptual Organization- Grouping Principles, Perceptual Organization- Grouping Principles Perceptual Organization- Grouping Principles

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sensation_and_perception - Sensation and Perception...

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