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Sensation and Perception
Chapter 5
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Sensation v. Perception
Brain (physical organ) Mind ( )
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Absolute Thresholds Do you think you could sense:
A of perfume in a 3 room apartment?
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Absolute Threshold Subliminal Stimulation
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Just Noticeable Difference
Difference Threshold Described by Light must vary by % must vary by % Sound must vary by %
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Sensory Adaptation Increases sensitivity to most important information
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How It Works: Vision Light enters the Light then passes through the
Passes through the pupil/iris Light then passes through the Finally falls on the
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How It Works: Vision Retina detects Brightness/Intensity Motion
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Notes
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How It Works: Vision Blind Spot Rods / Cones
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How It Works: Vision Hubel / Weisel – Facial Perception
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Notes
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How It Works: Vision Processing Milner’s Study
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How It Works: Vision Color Vision
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How It Works: Vision Theory Hering – Theory
Does not fully explain color vision Hering – Theory
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How It Works: Hearing Outer Ear Middle Ear Inner Ear
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How It Works: Touch Pain Phantom Limb
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Pain Locatable area of the brain that ‘senses’ pain Theory
Shows similar response to Theory Memory of Pain
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Pain Control Psychological Controls Physical Controls
Placebo (no drug) Exercise Thought Distraction Drugs Massage Acupuncture Surgery
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Taste Attraction/Avoidance Have basic tastes
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Notes
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Scent Sense of smell of all likely to trigger memory
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Ability to determine movement/location of limb/joint
Works with other senses to determine bodies position in space
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Vestibular Sense Inner ear Responsible for location of
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Depth Perception Visual Cliff Two Ways to Depth Perception
Monocular Cues Binocular Cues
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Perceptual Interpretation
Differences in perception are learned Critical period for normal sight Perceptual adaptation
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