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Sensations

TermDefinition
sensation A physical feeling or perception.
bottom-up processing When the brain processes sensory information and uses clues to understand stimuli.
perception The ability to see, hear, or become aware of something through the senses.
top-down processing Perceiving things based on your prior knowledge and experience.
absolute threshold The intensity of stimuli required to correctly identify that stimuli.
difference threshold The smallest distinguishable difference between two stimuli.
signal detection theory Perception is based on the intensity of the stimuli, psychological, and physical condition of the person.
sensory adaptation The way our senses adjust to stimuli.
selective attention Reacting to one particular stimuli while multiple are overlapping.
cornea The transparent layer at the front of the eye.
iris A membrane in the eye that adjust the size of the pupil.
pupil The opening in the iris that light passes through.
lens A curved structure in the eye that bends light, so that it is perceivable by the retina.
retina A layer at the back of the eye with light sensitive cells that can transmit signals to the brain.
receptor cells A cell or group of cells that receive stimuli.
rods Work well in dark spaces; not great for spatial perception.
cones Work well in bright spaces; great at spatial perception.
optic nerve Transmit signals from the retina to the brain.
blind spot Where the optic nerve connects to the retina; not sensitive to light.
trichromatic theory The theory that the human eyes only perceive the colors red, blue, and green; all colors are made by mixing these three.
opponent-process theory The theory that one member of a color pair suppresses the other.
pitch The highness or lowness of a tone.
cochlea The spiral cavity in the inner ear that processes sound.
hair cells The sensory cells of the auditory and vestibular systems.
auditory nerve The nerve connecting the cochlea to the brain.
kinesthetic sense The sense of the position and movement of the body.
vestibular sense Creates the sense of balance and spatial orientation.
Created by: Awells404
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