PSYC 2010 Lecture 9: February 6, 2017

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8 Feb 2017
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February 6, 2016
PSYC 2010
Lecture 9
Chapter 5: Sensation and Perception
The Basics
o Five senses- seeing, hearing, smelling, tasting, touch
Sensation: the detection of external stimuli and the transmission of this information to
the brain
o Sensing the world around you
Perception: the processing, organization, and interpretation of sensory signals
o What the brain does with the sensory information
Both occur in all 5 of the senses
Both originate from environmental stimuli
o Stimulus
Basically anything that interacts with your senses
Physical input physiological changes in a sensory organ
Transduction
o Process by which physical input neural signals
o Taking something from your senses and turning it into action potentials, or
something your brain can understand
Example
o Stimulus: green light at a stoplight emits physical properties in the form of light
waves
o Sesatio: sesor reeptors i the drier’s ees detect the stimulus
o Sensory coding: the stimulus is transduced (translated into chemical and
electrical signals that are transmitted to the brain)
o Pereptio: drier’s rai proesses eural sigal ad ostruts a
representation of a green light ahead. The brain interprets the representation of
the light as a sign to continue driving
Sensation is part of perception
Sensation
o Early processing
o Raw sensory input
Perception
o After sensation
o Mental representation
Senses: 5 modalities
o What physical properties activate each?
Sense
Structure
Properties
Vision
Eyes
Light
Olfaction
Nose/epithelium
Chemical
Gustatory
Tongue
Chemical
Audition
Ears
Mechanical
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