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study of relationships btw physical characteristics of stimuli and our experience of them
smallest change in stimulation that a person can detect (aka just noticeable difference)
signal detection theory
theory that a person's experience, expectations, motivation, and level of fatigue influnce thresholds
image focused in front of retina; see close objects clearly; distant objects less clear
decreased ability to see in reduced light; impaired rod function; deficiency of vitamin A
depth cue; compare images from the two eyes; brain computes distance; greater the difference btw the two images, the closer the object
chamber btw the eardrum and cochlea; hammer, anvil, and stirrup; concentrate the vibrations of the eardrum on the
innermost part of the ear; cochlea, semicircular canals, and vestibular sacs; relay sound waves to the auditory nerve fibers
opponent process theory
color vision is derived from three pairs of opposing receptors; blue and yellow, red and green, and black and white.
frequency matching theory
firing rate of a neuron matches the frequency of a sound wave to determine pitch
three semicircular canals; sense of balance, in the inner ear; connected to the brain by a nerve
organization of visual field into objects (figures) that stand out from their surroundings (ground)
brief auditory or visual messages that are presented below the absolute threshold
father of psychophysics, built on the work of Weber, refined principles of perception.
pioneered study of Just Noticeable Difference, which became Weber's law. JND is proportional to size of the stimulus.
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