The weakest amount of a stimulus that a person (or people) can detect half the time

The principle that the larger or stronger a stimulus, the larger the change required for an observer to notice a difference

The study of people’s tendency 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, 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

The nerve that carries impulses from the retina to the brain

The process of combining the images received from the two eyes into a single, focused image

The differences between the images stimulating each eye

The nerve that carries impulses from the inner EAR to the brain, resulting in sensation of sound

Three semi-circular canals that provide the sense of balance, located in the inner ear and connected to the brain by a nerve

The nerve that carries smell impulses from the nose to the brain

The sense of movement and body position

The sense of movement and body position

The experience that comes from organizing bits and pieces of information into meaningful wholes

Brief auditory or visual messages that are presented below the absolute threshold

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

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

visual sensory receptors found at the back of the retina,responsible for non color sensitivity to low levels of light

theory of color vision that proposes three types of cones: red blue and green

visual sensory receptors found at the back of the retina responsible for color vision and sharpness of vision

tendency of sensory receptor cells to become less responsive to a stimulus that is unchanging