Unit 7- Sensation and Perception Flashcards
sensation
the process of how our receptors receive and represent information
sensory receptors
sensory nerve endings that respond to stimuli
perception
the process of organizing and interpreting sensory information
bottom up processing
begins at your sensory receptors and makes it’s way up to the other levels of processing
top down processing
makes perceptions from both sensory input and past experiences, can often be wrong
selective attention
when awareness focuses on a singular part of any experience
cocktail party effect
the ability to listen to one voice in a sea of many
inattentional blindness
the blindness of millions of visual stimuli to not overwhelm our minds
change blindness
failure to notice a change in environment
signal detection theory
predicts when we will detect certain signals
transduction
translation of physical energy into electrochemical energy for processing
absolute threshold
the minimum stimulation necessary to detect something
subliminal
stimuli that are below your threshold
difference threshold
the minimum stimulus difference a person can detect half of the time
priming
an unconscious preparation
Weber’s Law
for two stimuli to be different there has a to be a certain percentage difference
sensory adaptation
When constantly exposed to unchanging stimuli we become less aware of it
wavelength
the distance of one wave peak to another
cornea
the clear outer layer of the eye
hue
color we experience
retina
a multilayered tissue on the eyes inner surface
intensity
amount of energy a wave contains
iris
a colored muscle that dilates or contracts due to intensity
lens
transparent focuser
pupil
a small adjustable opening
fovea
point of central focus
accommodations
when the lens changes the color and focus of waves
rods
retinal receptors for black, white, grey, movement, peripheral and twilight vision
cones
retinal receptors for daytime and color sensations, only behind the fovea
blindspot
a place in your eye with no receptor cells
light path
cornea → pupil →lens → retina
optic nerve
where the axons twine together
trichromatic theory (Young and Helmholtz)
the retina contains three color receptors red, green and blue
parallel processing
processing multiple things at once