u05 sensation slides 2010

8/8/2019 u05 Sensation Slides 2010

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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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Dust

Another one bites the dustAnother one bites the dustAnother one bites the dust


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Dust

Its fun to smoke marijuanaIts fun to smoke marijuanaIts fun to smoke marijuana


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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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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

u05 sensation slides 2010

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