MODULE 6

GLOSSARY

ACUITY -- perceptual sharpness.

AERIAL PERSPECTIVE -- aids in depth perception; clear objects appear closer than hazy ones.

BINAURAL CUES -- those that depend on perceiving differences in sound between the two ears.

BINOCULAR CUES -- those that depend on differences between the retinal image on the two eyes.

BRIGHTNESS CONSTANCY -- the tendency to perceive an object as having the same brightness regardless of light or shadow.

CLOSURE -- the tendency for gaps to be perceived as filled in.

COLOR CONSTANCY -- the tendency to perceive an object as the same color regardless of illumination.

CONES -- the cells of the retina that are sensitive to color.

FIGURE-GROUND -- the division of the perceptual field into the interdependent parts of the figure and the background.

GROUPING -- perceiving objects as groups.

ILLUSION -- when observations made with a physical instrument differ from observations made without such aid, the observed phenomenon is an illusion.

KINESTHESIS -- the muscle sense. A body sense that allows one to discriminate the position and movement of the parts of the body.

LOUDNESS -- the perception of the intensity of a sound.

PERCEPTION -- the process of becoming aware of the environment
through the sense organs.

PHI PHENOMENON -- an illusion in which stationary lights are flashed at specific intervals, producing apparent movement.

PHYSIOLOGICAL CUE -- a cue that depends on the structure or movement of the eyes.

PITCH -- the subjects perception of the highness or lowness of a sound.

PLACE THEORY -- the theory that different fibers on the basilar membrane are responding to different sound frequencies.

PROXIMITY -- the tendency for objects near each other to be perceived as a group.

PSYCHOLOGICAL CUE -- a cue that depends on experience.

RETINA -- the light sensation cells located at the back of the eye.

SENSORY -- pertaining to the stimulation of a sense organ.

SHAPE CONSTANCY -- the tendency to perceive an object as having the same shape regardless of viewing angle.

SIMILARITY -- the tendency for similar objects to be perceived as a group.

SIZE CONSTANCY -- the tendency to perceive an object as having the same size regardless of viewing distance.



145

UNIT 6 Table of Contents