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What occurs when a stimulus activates a receptor


The organization of sensory information into meaningful experiences


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 half the time

Weber's law

The principle that for any change in a stimulus to be detected, a constant proportion of that stimulus must be added or subtracted

Signal-Detection Theory

The study of people's tendencies to make correct judgments in detecting the presence of stimuli


The opening in the iris that regulates the amount of light entering the eye


A flexible, elastic, transparent structure in the eye that changes its shape to focus light on the 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


The sense of movement and body position


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


The tendency to perceive certain objects in the same way regardless of changing angle, distance, or lighting


Perceptions that misrepresent physical stimuli

Extrasensory Perception (ESP)

An ability to gain information by some means other than the ordinary senses


The organization of sensory information into meaningful experiences


The psychological study of questions such as the relationship between color and wavelength is called?

Difference Threshold

The minimal amount of difference a person can detect between two stimuli is the?


Incorrect perceptions


Is the sense of movement and body position

Binocular Fusion

The combination of 2 images into one


Is created when a stimulus activates a receptor

Subliminal Messages

Advertisers sometimes use this, which are brief auditory or visual stimuli presented below the absolute threshold so there is a less than 50% chance that they will be perceived

Absolute threshold

The weakest amount of stimuli required to produce a sensation

Vestibular System

A body's sense of balance is regulated by the___________ connected to the inner ear.

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