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Sensation & Perception
unitm12-17
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m12 - Introduction toSensation
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Psychophysics beginnings
Top-down vs Bottom-UpProcessing
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Absolute threshold
Signal detection
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Absolute threshold
Signal detection
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Yes there are two paths that you can go by,but in the long run theres still time tochange the road youre on
Stairway to Heaven
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Yes there are two paths that you can go by,but in the long run theres still time tochange the road youre on
Stairway to Heaven
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Oh heres to my sweet Satan. The one whoselittle path would make me sad, whose power isSatan.
Stairway to Heaven
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Oh heres to my sweet Satan. The one whoselittle path would make me sad, whose power isSatan.
Stairway to Heaven
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Another One Bites the
Dust
Another one bites the dustAnother one bites the dustAnother one bites the dust
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Another One Bites the
Dust
Another one bites the dustAnother one bites the dustAnother one bites the dust
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Another One Bites the
Dust
Its fun to smoke marijuanaIts fun to smoke marijuanaIts fun to smoke marijuana
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subliminal associations
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subliminal associations
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subliminal associations
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subliminal associations
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subliminal associations
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subliminal associations
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Difference threshold (Just noticeabledifference)
Webers Law
Light must differ by 8%
Weight by 2%
Tone by 0.3%
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Sensory adaptation
Sensory attention
Cocktail party effect
x
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What do you see?
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What do you see?Who
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What do you see?Who
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m13 - Vision
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Hue = wavelength
Intensity = amplitude
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Ganglion Cell Activity
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Ganglion Cell Activity
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Ganglion Cell Activity
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Feature Detection Cells
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Visual Processing
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VisualProcessingprocedure
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What do you see?
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What do you see?
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What do you see?
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What do you see?
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Young-Helmholtztrichromatic theory
additive color
mixing
Color Vision
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Color Vision
Opponent-Process Theory
after-image effects . . .
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Maybe color processing seems to occur intwo stages:
Retinal cones respond like Young-Helmholtz trichromatic theory
Signal processed via opponent-process in
the central nervous system
y
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ColorConstancy
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Color Constancy
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m14 - Hearing
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Amplitude = volume
Frequency = pitch
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Amplitude = volume
Frequency = pitch
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Echolocation
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Place Theory
Frequency Theory
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Conduction Hearing Loss
Sensorineural Hearing Loss
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m15 - Other Senses
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Touch
Pressure, warmth, cold, and pain
Only pressure has identifiable sensory
neurons
Pain is adaptive
Hyperalgesia and Congenital Analgia
Phantom Limb
Gate Control Theory
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Taste
Sweet, sour, salty, bitter ...and umami
Super-tasters
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Vestibular Sense vs Kinesthesis