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Unit 4 (Mod 16 (Sensation (receiving stimulus, not the same as perceiving,…
Unit 4
Mod 16
Sensation
receiving stimulus
not the same as perceiving
Bottom-up processing
= sensation 1st
Perception
interpretation of sensation
meaning
Top-down processing
=perception 1st
Selective attention
only process/focus on some info
limited focus on stimuli
Thresholds
Absolute threshhold
minimum stimulation required for detection 50% of time
Difference threshold
min. difference between stimuli that can be detected 50%/time
Webers law: must differ by percent
Mod 20
Hearing
Sound waves
move hairs in inner ear
Structure of ear
Pitches
2 theories
place theory:diff.pitches trigger nerves in dif. places
frequency theory: frequency of nerve impulses
locating sounds
sound depth
two ears
Mod 17
Perceptual set
like perception glasses for your world
how each individual perceives world
schemas
concepts that help us make sense of things
parapsychology
fake science
(telekinesis, telepathy)
Mod 18
Vision
Light
wavelength+amplitude=hue+brightness
The eye
cornea-pupil-iris-lens-retina
The retina
rods&cones=reception
activate ganglion cell
go to optic nerve
visual processing
parallel processing
motion+form+depth+color
feature detectors
specialized neurons for things
Mod 19
visual organization
figure vs. ground
grouping
depth perception
visual cliff
binocular cues
Perceptual constancy
color&brightness constancy
shape&size
visual intepretation
restored restrictions
perceptual adapation
Mod 21
other senses
touch
pain
nociceptors recieve
important
social influences
taste
tastebuds
sweet, bitter, sour, salty, umami
olfactory(smell)
olfactory receptors
directly processed
vestibular+kinesthesia
balance+positioning/movement
inner ear
sensory interaction
