Transcript Sensation

Chapter Five
Sensation
The Basics
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Sensation
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The mechanical process by which we “take in” physical
information from the outside world
Psychophysics
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Thresholds
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Absolute vs. j.n.d.
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Signal Detection Theory
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Weber’s Law
Subliminal Message
 Semantic Priming
 Behavior vs. Attitude
Adaptation
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Habituation
Vision
 Transduction
 Light
Energy
Wavelength – hue
 Amplitude – intensity
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 The
Eye
 Cornea
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 Pupil (Iris)  Lens  Retina
The Retina

Rods, Cones
 Blind Spot & Fovea
Vision (cont’d)
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Feature Detection
Parallel Processing
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We process several things at once
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Color Vision
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Young-Helmholtz Trichromatic Theory
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Opponent process theory
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Visual interpretation takes 30% of the cortex!!
 Selective motion neglect
 Lateral neglect (blindsight)
Red-green; blue-yellow; black-white
Color blindness
Afterimage Effect
Vision and Learning
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Brightness Contrast
Auditory Processing (Audition)
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Sound Wave  Outer Ear  Middle Ear  Inner Ear
Sound Wave
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Outer Ear
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Pinna  Auditory Canal  Tympanic Membrane
Middle Ear
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Amplitude – loudness (decibels)
Frequency – pitch
Ossicles: Hammer  Anvil  Stirrup
Inner Ear
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Cochlea: Oval Window  Basilar Membrane  Cilia (Loudness)
Auditory Nerve
Perceiving Pitch
 Helmholtz’s
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Different places on the cochlea’s basilar
membrane
 Frequency
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Place Theory
Theory
It is the frequency at which the basilar
membrane vibrates
 Locating
sound in space
Heh? What? I can’t hear you!
 Conduction
 Problems

hearing loss
with the mechanics of the ear
Eardrum, ossicles
 Sensorineural
 Problems

Deafness
with nerves or cilia
Cochlear implant
The Other Senses
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Touch
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Pressure, temp & pain
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Taste
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Sweet, Sour, Salty, Bitter
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Gate theory
Smell & Taste
Smell
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Olfactory Nerve sends to limbic system and
temporal lobe
Body Senses
 Kinesthesis
 Ability
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to sense position and motion
proprioception
 Vestibular
Sense
 balance
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Semicircular canals
 Synesthesia