Transcript Sensation and Perception

Sensation and Perception
Unit 6
Lesson 1
Objectives
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Define sensation and perception and
distinguish between them.
Define thresholds and variables which affect
measurements.
Explain why psychophysics is the oldest field
in psychology.
Warm Up
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What are the 5 basic
senses?
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Vision, Hearing, Taste,
Smell, Touch
Kinesthetic, Vestibular
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Sensation vs Perception
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Sensation
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The way sense receptors
take in stimuli (chemical
& electrical energy) and
transmit it to our brain.
Sensation vs Perception
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Transduction
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Sensory neurons convert
physical energy into
electrochemical signals
that are carried to the
brain.
Sensation vs Perception
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Perception
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The way our brain
interprets & organizes
sensations to understand
the world around us.
Psychophysics
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Study of relationship between sensations and
our perceptions of them.
Thresholds
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Absolute Threshold
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Point at which something
becomes noticeable to
our senses.
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(Min amt to detect 50%
time)
Thresholds
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Just Noticeable
Difference (JND)
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Weber’s Law
Difference Threshold
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Amount of change
needed for us to
recognize a change has
occurred.
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Larger or stronger a
stimulus, the larger the
change required for an
observer to notice
Signal Detection Theory
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Used to predict
when signal is
detected…
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Signal strength
Experience
Motivation
Expectation
Sensory Adaptation
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Decrease in sensitivity
to unchanging stimulus.
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Varies for each sense