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The minimum stimulation needed to detect a particular stimulus 50 percent of the time.
The process by which the eye’s lens changes shape to focus the image of near objects on the retina.
The sharpness of vision.
The sense of hearing.
The point at which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there.
Analysis that begins with the sense receptors and works up to the brain’s integration of sensory information.
A coiled, bony, fluid filled tube in the inner ear through which sound waves trigger nerve impulses.
Perceiving familiar objects as having consistent color, even if changing illumination alters the wavelengths reflected by the object.
Conduction Hearing Loss
Hearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea.
The minimum difference that a person can detect between two stimuli. We experience the difference threshold as a just noticeable difference. (Also called the just noticeable difference).
A condition in which faraway objects are seen more clearly than nearby objects because the image of near objects is focused behind the retina.
Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement.
The central focal point in the retina, around which the eye’s cones cluster.
The number of complete wavelengths that pass a point in a given time.