Psych Sosc Flashcards
(399 cards)
What are visual cues?
Depth, form, motion, and constancy.
What are binocular cues?
Retinal disparity and convergence.
What are monocular cues?
Relative size, interposition, relative clarity, texture gradient, relative height, relative motion, linear perspective, light and shadow.
What is Weber’s Law?
ΔI=I/k.
What is the absolute threshold of sensation?
The minimum intensity of stimulus needed to detect a particular stimulus 50% of the time.
What is the Just Noticeable Difference Threshold?
The smallest difference between two stimuli that is detectable 50 percent of the time.
What are semicircular canals?
Three fluid-filled canals in the inner ear responsible for our sense of balance.
What are otolithic organs?
Utricle and saccule; they help us detect linear acceleration and head positioning.
What is Signal Detection Theory?
How we make decisions under conditions of uncertainty, discerning between important stimuli and unimportant ‘noise.’
What is bottom-up processing?
Analysis that begins with the sensory receptors and works up to the brain’s integration of sensory information.
What is top-down processing?
The use of preexisting knowledge to organize individual features into a unified whole.
What are rods?
Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision.
What are cones?
Retinal receptor cells that function in daylight and detect fine detail and color sensations.
What is the phototransduction cascade?
What occurs when light hits the retina, turning a rod off and activating bipolar and retinal ganglion cells.
What is rhodopsin?
A light-sensitive pigment found in rod cells formed by retinal and opsin.
What are photoreceptors?
Rods and cones.
What is the fovea?
The central focal point in the retina, around which the eye’s cones cluster.
What is a blindspot?
The point at which the optic nerve leaves the eye, creating a ‘blind’ spot.
What is trichromatic theory?
Theory of color vision proposing three types of cones: red, blue, and green.
What is a hair cell?
One of the receptor cells for hearing in the cochlea.
What are sound waves?
Air molecules pressurized and trying to escape, creating areas of high and low pressure.
What is basilar tuning?
The organization of the basilar membrane that allows us to hear frequencies from 20-20000 Hz.
What is tonotypical mapping?
The primary auditory cortex has parts specialized for varying frequencies.
What is sensory narrow hearing loss?
A problem with conduction of sound waves from cochlea to brain.