Chapter 4

Question 1

visual agnosia

Answer 1

inability to recognize objects through sight

Question 2

sensation vs perception

Answer 2

sensation is the stimulation of sense organs, perception is the selection, organization and interpretation of sensory input

Question 3

psychophysics

Answer 3

the study of how physical stimuli are translated into psychological experience

Question 4

stimulus

Answer 4

any detectable input from the environment

Question 5

threshold

Answer 5

dividing point between energy levels

Question 6

absolute threshold

Answer 6

minimum stimulus intensity that an organism can detect 50% of the time

Question 7

Gustav Fechner

Answer 7

used a variety of methods to determine humans absolute threshold

Question 8

Just Noticeable Difference (JND)

Answer 8

is the smallest difference in stimulus intensity that a specific sense can detect

Question 9

signal detection theory

Answer 9

proposes that the detection of sensory inputsis influenced by “noise” and decision making strategies

Question 10

subliminal perception

Answer 10

the registration of sensory input without conscious awareness

Question 11

neural tissue that receives light and sends info to the brain

Answer 11

retina

Question 12

cornea

Answer 12

how light enters the eye

Question 13

lens

Answer 13

transparent eye structure that focuses the light rays falling on the retina

Question 14

pupil and iris

Answer 14

regulates the amount of light passing into the eye

Question 15

optic disk

Answer 15

blind spot in your eye

Question 16

visual receptors in the eye that play a key role in color and day vision

Answer 16

cones

Question 17

tiny spot in the center if the retina that only contains cones. where visual acuity is the greatest

Answer 17

fovea

Question 18

visual receptors for night and peripheral vision

Answer 18

rods

Question 19

ganglion cells

Answer 19

form optic nerve

Question 20

Wertheimer

Answer 20

gestalt principals

Question 21

Pareidolia

Answer 21

seeing faces in objects