5Sensationenhanced

5Sensationenhanced - Myers PSYCHOLOGY (6th Ed) Chapter 5...

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Unformatted text preview: Myers PSYCHOLOGY (6th Ed) Chapter 5 Sensation James A. McCubbin, PhD Clemson University Worth Publishers Sensation Sensation a process by which our sensory receptors and nervous system receive and represent stimulus energy Perception a process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events Sensation Our sensory and perceptual processes work together to help us sort out complex processes Sensation Bottom-Up Processing analysis that begins with the sense receptors and works up to the brains 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 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 Signal Detection Theory predicts how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise) assumes that there is no single absolute threshold detection depends partly on persons experience expectations motivation level of fatigue Sensation- Thresholds Subliminal When stimuli are below ones absolute threshold for conscious awareness 25 50 75 100 Low Absolute threshold Medium Intensity of stimulus Percentage of correct detections Subliminal stimuli Sensation- Thresholds Webers Law- to perceive as different, two stimuli must differ by a constant minimum percentage light intensity- 8% weight- 2%...
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This note was uploaded on 12/07/2011 for the course PSYCH 111 taught by Professor Larson during the Fall '11 term at BYU.

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5Sensationenhanced - Myers PSYCHOLOGY (6th Ed) Chapter 5...

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