Vocab 2 Flashcards
define SENSATION
process which sensory receptors of nervous system receive and represent stimulus from environment
define PERCEPTION
process of organizing and interpreting sensory info to recognize meaning
define BOTTOM-UP PROCESSING
analysis of beginning w/sensory receptors and works up to brains integration of sensory info
define TOP-DOWN PROCESSING
info processing by higher level mental processes as when we construct perceptions drawing on experiences and expectations
define SELECTIVE ATTENTIONS
focusing of conscious awareness on articular stimuli
define INATTENTIONAL BLINDNESS
fail to see visible objects when attention moved elsewhere
define CHANGE BLINDNESS
fail to notice environment changes
define PSYCHOPHYSICS
study of relationships between physical characteristics of stimuli and psychological experience of them
define ABSOLUTE THRESHOLD
minimum stimulation to detect stimulus 50% of time
define SIGNAL DETECTION THEORY
predict how and when detect presence of faint stimulus and assumes detection partly based on experiences, expectations, motivations, and alertness and no absolute minimum threshold
define SUBLIMINAL
below one’s absolute threshold to conscious awareness
define PRIMING
gen unconscious activation of certain associations predisposing perception/memory/response
define DIFFERENCE THRESHOLD
minimum difference between 2 stimuli required for detection 50% of time
define WEBER’S LAW
stimuli must differ by constant minimum % to be perceived as different
define TRANSDUCTION
transform stimulus energies into neural impulses the brain can interpret
define SENSORY ADAPTATION
diminished sensitivity bc of constant stimulation
define WAVELENGTH
distance from peak of 1 light/sound wave to peak of next
define HUE
dimension of color determined by wavelength of light
define INTENSITY
amount of energy in light/sound wave determined by wave’s amplitude
define PUPIL
adjustable opening in center of eye through which light enters
define IRIS
ring of muscle tissue that form colored portion of eye around pupil and controls size of pupil opening
define LENS
transparent structure behind pupil changing shape to focus on image
define RETINA
light sensitive inner surface of eyes w/rods and cones
define ACCOMMODATION
process lens changes shapes to focus on near/far objects
define RODS
retinal receptors detecting black, white, and grey necessary for peripheral and twilight vision when cones don’t respond
define CONES
retinal receptors concentrated near center of retina that detect detail and color in well-lit conditions
define OPTIC NERVE
nerve from eye to brain
define BLIND SPOT
point which optic nerve leaves eye creating a blind spot
define FOVEA
central focal point in retina where cones cluster
define FEATURE DETECTORS
nerve cells in brain that respond to specific features of stimuli
define YOUNG-HEMHOLTZ TRICHOMATIC PROCESSING THEORY
theory retina contains 3 different color receptors (green, red, and blue) when stimulated in combo can produce perception of any color
define OPPONENT-PROCESSING THEORY
theory opposing retinal processes enable color vision
define AUDITION
sense/act of hearing
define FREQUENCY
number of complete wavelengths that pass a point of given time
define PITCH
tone either high or low
define MIDDLE EAR
chamber between ear drum and cochlea w/malleus, incus, and stapes concentrating vibrations of eardrum on cochlea oval window
define COCHLEA
coiled, bony fluid-filled tube in inner ear and sound waves traveling through cochlear fluid trigger nerve impulses
define INNER EAR
innermost part of ear w/cochlea, semicircular canal, vestibular sacs