ch 3 sensation & perception

Question 1

______ is the activation of receptors in the various sense of organs

Answer 1

sensation

Question 2

_____ ______ ______ is the smallest difference between two stimuli that is detectable 50% of the time

Answer 2

just noticeable difference

Question 3

the smallest amount of energy needed for a person to consciously detect a stimulus 50% of the time it is present is called _____ _____.

Answer 3

absolute threshold

Question 4

the process by why subliminal stimuli act upon the unconscious mind, influencing behavior is called _____ _____.

Answer 4

subliminal perception

Question 5

________ is the tendency of the brain to stop attending to constant, unchanging information

Answer 5

habituation

Question 6

the tendency of sensory receptor cells to become less responsive to a stimulus that is unchanging is known as _____ ______.

Answer 6

sensory adaptation

Question 7

this refers to the purity of the color people see and it is called ______.

Answer 7

saturation

Question 8

the _____ is a clear membrane that covers the surface of the eye; it protects the eye & is the structure that focuses most of the light coming into the eye

Answer 8

cornea

Question 9

the _____ is another clear structure behind the iris, suspended by muscles; it finished the focusing process begun by the cornea

Answer 9

lens

Question 10

the visual sensory receptors found at the back of the retina responsible for color vision & sharpness of vision are called the _______.

Answer 10

cones

Question 11

the recovery of the eye’s sensitivity to visual stimuli in light after exposure to darkness is called ____ _____.

Answer 11

light adaptation

Question 12

the images that occur when a visual sensation persists for a brief time even after the original stimulus is removed are called _______.

Answer 12

afterimages