EXAM 2 Flashcards
sensation
the process that detects stimuli from our bodies and environment
perception
the process that organizes those sensations into meaningful information
absolute threshold
the minimum amount of stimulation that can be detected by the senses
just noticeable difference (JND)
the smallest increase/decrease in a physical stimulus required to produce a change in sensation that a person can identify half the time
Weber’s law
JND is based on a percentage/proportion of stimulus change rather than a fixed amount of change
cornea
a tough, transparent protective layer of the eye; bends light rays inward through the pupil
pupil
a small dark opening in the center of iris
iris
responsible for dilating and contracting pupil to regulate the amount of light entering the eye
lens
the transparent disk-shaped structure behind iris and pupil; focuses items on the retina
rods
night vision and peripheral vision
cones
day vision and color vision
phi phenomenon
the brain has the ability to r produce apparent motion with distinct sensations
beta movement
related phenomenon that allows us to see movies (still pictures)
figure ground principle
- figure is perceived as form, ground appears formless
- counter line divides figure from background
- figure is in the foreground with the ground behind
similarity
objects that have similar characteristics are grouped together
proximity
objects that are close together are grouped together
continuity
figures/objects that are perceived as belong together if there’s a continuous pattern
closure
figures with gaps in them are perceived as complete
decoding sound waves
- sound waves hit the ear drum
- tiny ear bones transmit the vibrations to the cochlea
- fluid bends hair cells and triggers impulses in nerve cells
- nerve cells transmit a signal to the auditory cortex
gustation
the sense of taste (sweet, sour, salty, bitter, umami)
taste buds
structures in any of ht tongues paella composed of 60-100 receptor cells of taste
papillae
the small bumps on the tongue containing taste buds
controlled processes
most active state where you’re focused on a goal
automatic processes
when something requires little conscious effort so the task is put on auto and attention is divided