Sensory Perception Flashcards
(30 cards)
binocular cues
allow perception/sense of depth with two eyes operated by 2.5 inches (creating retinal disparity)- this gives humans an idea of depth
convergence
also gives humans an idea of depth based on how much the eyeballs are turned
- when things are far away, they are relaxed
- when things are close, they are contracted
monocular cues
visual cues that do not require two eyes (unlike convergence and binocular) that give humans a sense of form of th eobjecy t
interposition (overlap)
is when two objects with one before the other, the front is perceived to be smaller
relative height
higher objects are perceived to be farther away than closer objects
shading and contour
allows us to perceive depths/contours
what are the monocular cues
relative size, height, interposition, shading and contour, gives motion parallax, constancy
relative size
he relative size (can be inferred with one eye- the closer an object, ithe larger it seems)
motion parallax
when things that are farther away appear to move slower, given by monocular cues
constancy
our perception of an object doesnt change even if the image cast on the retina is different e..g size shape colour constancy
size constancy
one that appears larger because it is closer but we still know that it is the same size
shape constnatncy
- a changing shape but still maintains the same shape perception e.g. opening door, we still know that it is a rectangle despite the shape change
colour constnacy
changes in lighting but we stilll knoww that th eobject is the same colour
sensory adaptation
change their sensitivity to simtuli .e.g hearing, touch , smell, proprioception, sight
hearing adaptation
the inner ear muscle will contract in order to protect the ear drum when exposed to high noises for longer than a few seconds (takes a few seconds to kick in), so not applicable to things like gun shots
touch adaptation
for ex when temperature receptors become desensitized over tim
smell adaptation
when receptors in the nose become desensitized to smells over time
proprioception**
0 sense of the position of the body in space e.g. with googles that flip everything upside down, eventually u would be able t o accommodate this and flip it back over to normal???
sight
down or up regulation to light intensity
down regulation to light intensity
when it is bright out pupils will constrict such that less light enters the eye, and the rods and cones become desnitized
up regulation to light intenstiy
in the dark, the pupils will dilate and rods and cones start making light sensitive molecules
weber’s law
The law states that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus.
JND
just noticeable difference represents the threshold at which u are able to notice a change in any sensation
I = initial intensity of stimulus
Delta I = JND
