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AP Psychology Chapter 5
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sensation
collecting physical info from environment
perception
selecting, organizing, and interpreting sensations
bottom-up processing
start with sensory receptors and work up
top-down processing
start with experience and work down
psychophysics
physical characteristics of stimuli and psychological experience
absolute threshold
minimum stimulation needed to detect one half the time
signal detection theory
how we detect stimuli amidst background noise
subliminal
below absolute threshold for conscious awareness
priming
activation of associations
difference threshold
minimum difference between two stimuli to detect one half the time
Weber's law
difference threshold is a constant minimum percentage
sensory adaptation
diminished sensitivity of constant stimulation
transduction
conversion of one form of energy to another
wavelength
distance from peak of one wave to peak of next
pitch
experienced highness or lowness of sound
intensity
amount of energy - brightness or loudness
pupil
adjustable opening where light enters
iris
ring of muscle tissue; control eye color and pupil size
lens
behind pupil; stretches to focus image on retina
accomodation
eye's lens changes shape to focus on near or far objects
retina
contains receptors; beginning of transduction
acuity
sharpness of vision
nearsightedness
near objects clear, far objects not
farsightedness
far objects clear, near objects not
rods
receptors - light and dark
cones
receptors - detect colors
optic nerve
nerve that carries neural impulses from eye to brain
blind spot
where optic nerve leaves eye; no receptors
fovea
focal point in retina; cones cluster
feature detectors
nerve cells that respond to specific features
parallel processing
processing several objects simultaneously
Young-Helmholtz tri-chromatic theory
3 basic color receptors (red, blue, green)
opponent-process theory
opposing processes enable color vision
color constancy
familiar objects have consistent color
audition
hearing
frequency
number of waves per unit of time
middle ear
between ear drum and cochlea; bone vibrations send messages to cochlea
cochlea
coiled bone; sound waves trigger neural impulses
inner ear
cochlea; semicircular canals; vestibular sacs
place theory
pitch linked to where on cochlear membrane is stimulated
frequency theory
rate of nerve impulses determines pitch
conduction hearing loss
damage to mechanical system
sensorineural hearing loss
damage to cochlear receptive cells
cochlear implant
converts sound into electrical signals
gate-control theory
controls pain signals
sensory interaction
senses can influence one another
kinesthesis
sensing position and movement of body parts
vestibular sense
body movement and position (includes balance)
afterimage
staring at one color makes you see opponent color
Author
melrebek1
ID
60579
Card Set
AP Psychology Chapter 5
Description
Basics of Sensation
Updated
2011-01-18T23:42:34Z
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