Chapter 3 – Fill in the Blanks Sensation and Perception1.____________________ is the activation of receptors in the various sense organs.2.____________________________________________________________________ is the smallest difference betweentwo stimuli that is detectable 50 percent of the time.3.The smallest amount of energy needed for a person to consciously detect a stimulus 50 percent of the time it is present iscalled __________________________________________.4.The process by why subliminal stimuli act upon the unconscious mind, influencing behavior is called ___________________________________.5.____________________________ is the tendency of the brain to stop attending to constant, unchanging information.6.The tendency of sensory receptor cells to become less responsive to a stimulus that is unchanging ________________________________________.7.This refers to the purity of the color people see and it is called _______________.8.The ________________is a clear membrane that covers the surface of the eye; protects the eye and is the structure thatfocuses most of the light coming into the eye.9.The ____________________ is another clear structure behind the iris, suspended by muscles; finishes the focusing processbegun by the cornea.
