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Intro to Sensation & Perception (Ch.4)

Course Code
Blaine Mullins

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Sensation: simple awareness resulting from stimulation of a sense organ
and that's all, "something soft
is touching my skin
(texture, physical pain)
hair cells (in ear, physical movement into neural impulses)
taste cells
Transduction: sensors in the body turns physical signals from the environment to into
neural signals sent to the central nervous system (brain &spinal cord)
prolonged exposure to a stimulus.
(hot tub, not as hot as it was initially)
Sensory adaptation: reduced sensitivity to stimulation resulting from
Perception: the organization , identification, and interpretation of a sensation.
can make sense of things (shapes, forms) not just a blur of colour
as with sensation
Perceptual system uses 3 types of info:
properties of physical environment
electrical activity in nervous system
Prior experience & knowledge (what you know can override what you're actually seeing)
Cognition: the process of being aware of, knowing, thinking, learning, judging.
Latin for "cognoscere" to know, become acquainted with
Something can be sensed, perceived, but unnoticed
Mostly unconscious process
light enters eye, retinal cells respond to yellow, red etc-activated
Cake identified
thinking about cake, memories,
talking about cake
Associating sound with aspect
of shape
Synesthesia: a condition in which the stimulation of one
sensory pathway in the nervous system results in the automatic activation
not imaginary, not association, it's actually happening
taste colour, hear numbers
colour with senses is most common- Monday is pink
Sounds the same (brick, quick) often tastes the same
V1 & V4 are activated in the brain when hearing certain words
intermingling of seeing and hearing
of another sensory system.
Registers: odor, sound, pressure, or taste
After a sensation in your CNS
perception takes place at the
level of your brain.
Eyes (sensory organ) aren't really seeing the words,
they're encoding different shapes and patterns of ink
on the page, the brain (perceptual organ) transforms
the into coherent mental representations of words
Sensation & Perception
2:18 PM
Intro Sensation & Perception Page 1
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