| A | B |
| afterimage | the firing of the cones not used while viewing something steadily in order to bring the visual system back in balance |
| audition | the senses of hearing |
| blind spot | the portion of the retina through which the optic nerve exits and where there are no receptors for light waves |
| closure | the process of filling in the missing details of what is viewed |
| cochlea | a snail-shaped part of the ear, filled with fluid and small hairs that vibrate incoming sound |
| color constancy | the ability to perceive an object as the same color regardless of the environment |
| cornea | the clear outer covering of the eye behind which is fluid |
| cutaneous receptors | the nerve receptors in the skin that respond to pressure, temperature, or pain |
| decibels | a measure of how loud a sound is |
| gestalt | organized whole, shape, and form |
| lens | the part of the eye that focuses an object on the back of the eye |
| olfaction | the sense of smell |
| perception | the process of assembling and organizing sensory information to make it meaningul |
| retina | the back of the eye, which contains millions of receptors for light |
| reversible figure | an illusion in which the same object is seen as two altering figures - first one, then the other |
| rod | a visual receptor most sensitive to the violet-purple wavelengths; very sensitive for night vision; "sees" only black and white |
| sensation | the process of receiving information from the environment |
| size constancy | the ability to retain the size of an object regardless of where it is located |
| timbre | the complexity of sound |
| visual texture | depth perception based on how rough or smooth objects appear |