| Term | Definition |
|
selective attention |
focusing of conscious awareness on a particular stimulus, as in the cocktail party effect |
|
inattentional blindness |
failing to see visible objects when our attention is directed elsewhere |
|
visual capture |
tendency for vision to dominate the other senses |
|
gestalt |
organized whole |
|
figure-ground |
organization of the visual field into objects (the figures) that stand out from their surroundings (ground) |
|
grouping |
perceptual tendency to organize stimuli into coherent groups |
|
depth perception |
ability to see objects in three dimensions although the images that strike the retina are two-dimensional; allows us to judge distance |
|
visual cliff |
laboratory device for testing depth perception in infants and young animals |
|
binocular cues |
depth cues, such as retinal disparity and convergence, that depend on the use of two eyes |
|
retinal disparity |
binocular cue for perceiving depth; by comparing images with two eyeballs, the brain computes distance- greater the disparity (difference) between the two images, the closer the object |
|
convergence |
binocular cue for perceiving depth; the extent to which the eyes converge inward when looking at an object |
|
monocular cues |
depth cues, such as interposition and linear perspective, available to either eye alone |
|
phi phenomenon |
illusion of movement created when two or more adjacent lights blink on and off in a quick succession |
|
perceptual constancy |
perceiving objects as unchanging (having consistent lightness, color, shape, and size) even as illumination and retinal images change |
|
perceptual adaptation |
in vision, the ability to adjust to an artificially displaced or even inverted visual field |
|
perceptual set |
mental predisposition to perceive one thing and not another |
|
extrasensory perception (ESP) |
controversial claim that perception can occur apart from sensory input (telepathy, clairvoyance, precognition) |
|
telepathy |
mind-to-mind communication |
|
clairvoyance |
perceiving remote events, like sensing that a friend's house is on fire |
|
precognition |
perceiving future events |