RHCh5 - Myers EXPLORING PSYCHOLOGY(7th Ed Chapter 5...

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1 Myers’ EXPLORING PSYCHOLOGY (7th Ed) Chapter 5 Sensation and Perception James A. McCubbin, PhD Aneeq Ahmad, Ph.D. (Modified by Ray Hawkins, Ph.D.) Worth Publishers
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2 Sensation Sensing the World: Some Basic Principles Thresholds Sensory Adaptation
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3 Sensation Vision The Stimulus Input: Light Energy The Eye   Visual Information Processing Color Vision
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4 Sensation The Other Senses Hearing Touch Pain Taste Smell Body Position and Movement
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5 Perception Perceptual Organization Form Perception Depth Perception Perceptual Constancy
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6 Perception Perceptual Interpretation Sensory Deprivation and Restored  Vision Perceptual Adaptation Perceptual Set
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7 How do we construct our representations of the external  world? To represent the world, we must detect physical energy  (a stimulus) from the environment and convert it into  neural signals. This is a process called  sensation. When we select, organize, and interpret our sensations,  the process is called  perception.
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8 Bottom-up Processing Analysis of the stimulus begins with the sense receptors  and works up to the level of the brain and mind. Letter “A” is really a black blotch broken down into features  by the brain that we perceive as an “A.”
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9 Top-Down Processing Information processing guided by higher-level  mental processes as we construct perceptions,  drawing on our experience and expectations. T H E C H T
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10 Our sensory and perceptual processes work together  to help us sort out complex images. Making Sense of Complexity “The Forest Has Eyes,”  Bev Doolittle
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11 Sensing the World Senses are nature’s gift that suit an organism’s needs.  A frog feeds on flying insects; a male silkworm moth is  sensitive to female sex-attractant odor; and we as  human beings are sensitive to sound frequencies that  represent the range of human voice.
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12 Exploring the Senses What stimuli cross our threshold for  conscious awareness?
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13 Psychophysics A study of the relationship between physical  characteristics of stimuli and our psychological  experience with them. Physical World Psychological  World Light Brightness Sound Volume Pressure Weight Sugar Sweet
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14
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15 Thresholds Absolute Threshold :   Minimum stimulation needed to  detect a particular stimulus 50% of the time. Proportion of “Yes” Responses 0.00                 0.50                1.00              0            5            10           15          20          25                            Stimulus Intensity (lumens)
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Subliminal Threshold Subliminal Threshold:  When  stimuli are below one’s  absolute threshold for  conscious awareness. Kurt Scholz/ Superstock
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RHCh5 - Myers EXPLORING PSYCHOLOGY(7th Ed Chapter 5...

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