Chapter 4: Sensation and Perception Flashcards
sensation
picking up on chemical signals/messages
accessory structure
modifies the incoming energy
sound
perception of vibration from the movement of air molecules
how is sound usually measured?
DECIBELS
for every increase of 20 decibels, the amplitude goes up by…
10 times
Male voices tend to sound “deeper” or “lower” than female voices. If we looked at the sound waves, we would see that this is because male voices would have ______.
lower frequencies
what is not an “accessory structure”?
hair cells
sensory nerves
transports sensory input into the brain
(think CNS and PNS)
if the bones in your ear become somewhat damaged, how will your hearing be effected?
could lead to everything sounding quiet or muffled
what is vision?
our ability to sense light
photoreceptors within the eye
rods and cones
sensory receptor
converts energy to different signals so we can understand them
(or something among those lines)
trichromatic theory
most people have 3 types of cones that respond to different wavelengths of light
analgesic
inability to feel pain
top down processing
involves high level, knowledge-based info
bottom up processing
begins with basic info and works its way up
TSA example for response criterion: airport received multiple terriost threats, do you have low or high critera?
low
weber’s law
the just noticable difference
fencher’s law
how big the difference feels
psychophysics
describes the relationship between the physical environment and psychological experiences
if the cornea of the eye is damaged, how will this affect your sight?
lenses of eye will be unable to focus
common fate
Sets of objects that move in the same direction at the same speed are perceived together.
the color white is a result in sensing…
an equal combination of short, medium and long wavelength light
common region
Stimuli located within some boundary tend to be grouped together
