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Vocabulary for Theme 3b

Sensation What occurs when a stimulus activates a receptor.
Perception The organization of sensory information into meaningful experiences.
Psychophysics The study of the relationships between sensory experiences and the physical stimuli that cause them.
Absolute Threshold The weakest amount of a stimulus that a person can detect half the time.
Difference Threshold The smallest change in a physical stimulus that can be detected between two stimuli.
Weber's Law The principle that for any change(s) in a stimulus to be detected, a constant proportion of that stimulus(s) must be added or subtracted.
Signal-detection Theory The study of people's tendencies to make correct judgements in detecting the presence of a stimuli.
Pupil The opening in the iris that regulates the amount of light entering the eye.
Lens A flexible, elastic, transparent structure in the eye that changes its shape to focus light in the retina.
Retina The innermost coating of the back of the eye, containing the light-sensitive receptor cells.
Optic Nerve The nerve that carries impulses from the retina to the brain.
Binocular Fusion The process of combining the images received from the two eyes into a single, fused image.
Retinal Disparity The differences between the images stimulating each eye.
Auditory Nerve The nerve that carries impulses from the inner ear to the brain, resulting in the perception of sound.
Vestibular System Three semicircular canals that provide the sense of balance, located in the inner ear and connected to the brain by a nerve.
Olfactory Nerve The nerve that carries smell impulses from the nose to the brain.
Kinesthesis The sense of body movement and body position.
Gestalt The experience that comes from organizing bits and pieces of information into meaningful wholes.
Subliminal Messages Brief auditory or visual messages that are presented below the absolute threshold.
Motion Parallax The apparent movement of stationary objects relative to one another that occurs when the observer changes position.
Constancy The tendency to perceive certain objects in the same way regardless of changing angle, distance, or lighting.
Illusions Perceptions that misrepresent physical stimuli.
Extrasensory Perception An ability to gain information by some means other than the ordinary senses.
Created by: tderue
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