Chapter 4 Sensation and Perception
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Transcript of Chapter 4 Sensation and Perception
Chapter 4Sensation and Perception
How does the world out there get in?
Describe a situation where…1. you experienced difficulty as a result of
failing to hear, see, taste, smell, or feel something around you.
2. you sensed something in the environment but were unable to accurately interpret the info.
sensation• stimulation of sensory receptors and
transmission of sensory information to the central nervous system (CNS)
• occurs when a stimulus activates a receptor
• automatic
perception
• process through which we interpret sensory stimulation– reflects learning, expectations, attitudes
• organization of sensory information into meaningful experiences
Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deosn't
mttaer in waht oredr the ltteers in a wrod are, the olny
iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit
pclae. The rset can be a total mses and you can sitll raed it
wouthit a porbelm. Tihs is bcuseae the huamn mnid deos
not raed ervey lteter by istlef, but the wrod as a wlohe.
absolute threshold
• weakest amount of stimulus required to produce a sensation
• (needed to block out extraneous stuff)
difference threshold
• minimum amount of difference a person can detect between 2 stimuli
signal-detection theory
• recognizing stimulus against background of competing stimuli
Red Blue Yellow Green
Orange Blue Red Yellow
Green Orange Blue Red
Red Green Blue Orange
sensory adaptation
• process by which we become more sensitive to weak stimuli and less sensitive to unchanging stimuli
DEMONSTRATIONS FOR 4-2 (THE EYE)
“Seeing is believing.”
PERCEPTIONChapter 4, Section 5
Closure
object = figure surrounding = ground
Proximity
A Review of the Gestalt Rules of Perceptual Organization
• What were the five rules?– proximity, similarity, continuity, connectedness, closure
Stroboscopic Motion
Texture Gradient
Color Constancy