Chapter 6: Sensation and Perception Flashcards
Bottom-Up Processing
Analysis beginning with sensory receptors and works towards brain’s integration of info
Top-Down Processing
Processing guided by high-level mental processes, constructing Perceptions
Psychophysics
study of relationships between physical characteristics and our psychological experience of them
Absolute Threshold
level of stimulation for sensation to occur 50% of the time
Subliminal
below threshold of awareness perceiving ability
Priming
activation causing predisposition
Sensation
process of receiving raw information from enviroment
Adaptation
gradual loss of attention to unneeded or unwanted stimulation due to prolonged unchanged stimulus
Perception
process of organizing sensory information to be meaningful
Vision
The correct name for sight
White Light
light as originates from source before broken into frequencies
Color
is seen after white light hits objects and bounces at different speed or frequencies
Young-Helmholtz Trichromatic Theory
mixing of blue/green/red can produce any color
Opponent-Process
color-sensitive visual elements are grouped into red-green, blue-yellow, and black-white elements
Afterimage
image that remains after stimulation of the retina has ended, unused cones start firing to balance
Cornea
clear outer covering fluid behind it
Iris
colored circular muscle, has control of amount of light
Lens
bends light rays, focuses an image on the retina
Accomodation
change shape and bend light to focus
Pupil
opening of the eye, changes size as the iris moves
Retina
back of the eye that absorbs light rays, contains millions of receptors
Rods
highly light-sensitive, color insensitive receptors, sensitive for night vision
Cones
visual receptor that responds to distinguish colors
Fovea
retina center where cones are highly concentrated
Acuity
visual clarity, greatest on fovea, want 20/20
Color Blindness
inability to perceive certain colors
Optic Nerve
place where all the nerve cells leave the eye
Blind Spot
portion of the retina through which the optic nerve exits
Vision is affected by
Shape of Eyes
Farsightedness
eye too short, only distant focused
Nearsightedness
eye too long, images fall short of the retina
Audition
uses sound waves to hear
Amplitude
difference between peak and baseline