sensation and perception Flashcards
(50 cards)
sensation
using our five senses to encode nformation
absolute threshold
the weakest level of a stimulus that can still be detected 50% of the time
signal detection theory
for some stimuli there is no absolute threshold due to factors such as fatigue, attention, emotion, distress, etc.
sublimal stimulation
a real change but you don’t notice because its so small
difference threshold
minimum difference between two stimuli that a person can detect 50% of the time
goldilocks moment - just right!
webers law
the bigger the stimulus change, the more the difference threshold goes up
bottom up processing
react first then think
top down processing
think and then react
constancies
things that stay constant even though it may appear to change when it gets closer/farther away
pupil
light reflects through it to see an object
vitreous
white part of the eye
retina
in back of eye
cornea
rigid transparent structure on surface of eyeball
lens
adjustable and helps to focus
myopia
cant see far away
hyperopia
can’t see close up
what are the two types of visual receptors
rods and cones
cones
help you see color
rods
help you see in the dark
dark adaptation
the gradual ability to be able to see better after the lights go out (the act of your eyes adjusting to the darkness and being able to see better)
fovea
in charge of sharp vision
cones and rods live in the center
trichromatic theory
AKA YOUNG HELMHOLTZ THEORY
our recepetors (cones) respond to three primary colors red green and blue
opponent process theory
we do not percieve colors as individual but in paired opposites
red v green
yellow v blue
white v black
vestibular sense
helps with balance
lives in inner ear
needs vision also (why its hard t stand on one foot with eyes closed)
