Psychology 3

Question 1

what is sensation?

Answer 1

sensory organs receive information from environment.

Question 2

transduction

Answer 2

process when people physical energy is converted into sensory neural impulses.

Question 3

perception

Answer 3

process when people select organize and interpret sensations

Question 4

psychophysics

Answer 4

Gustav Fechner. study of the relationship between physical stimulation and subjective sensations.

Question 5

absolute threshold

Answer 5

smallest amount of stimulation that can to detected. no thresholds are absolute. what can be detected 50% of the time.

Question 6

signal detection theory

Answer 6

theory that detecting a stimulus is determined by signal and the subject’s response criterion. willingness to say yes or no

Question 7

just noticeable difference

Answer 7

just enough change for it to be noticeable. smallest amount of change in a stimulus that can be detected 50% of the time.

Question 8

Weber’s law

Answer 8

principle that the just noticeable difference of a stimulus is a constant proportion despite variations in intensity.

Question 9

Medium wavelength

Answer 9

greenish

Question 10

short wavelength

Answer 10

bluish

Question 11

long wavelength

Answer 11

reddish

Question 12

amplitude

Answer 12

height of peaks of a light wave determines intensity

Question 13

wavelength

Answer 13

determines color

Question 14

purity

Answer 14

measured by number of wavelengths that make up a light wave influences saturation

Question 15

steps of vision

Answer 15

cornea, iris pupil, lens, vitreous humor, retina, optic nerve ,optic chasm, thalamus, visual cortex

Question 16

rods

Answer 16

photo receptor highly sensitive to light best in dim light

Question 17

cones

Answer 17

photoreceptor sensitive to color located in fovea.

Question 18

fovea

Answer 18

center of retina

Question 19

trichromatic theory

Answer 19

theory that retina contains 3 types of receptors red blue green these combine to make other colors

Question 20

opponent process theory

Answer 20

explains color deficiency color deficient people tend to confuse colors. Hering believed that colors are derived from 2 pairs of opposing colors on color wheel. blue-yellow, red- green, black-white

Question 21

cornea

Answer 21

curved membrane that bends light light comes here first

Question 22

iris

Answer 22

gives eye color, regulates size of pupil.

Question 23

pupil

Answer 23

hole in iris where light passes

Question 24

lens

Answer 24

behind pupil brings image into focus

Question 25

vitreous humor

Answer 25

jelly like substance fills center part of eyeball like passes here before retina

Question 26

retina

Answer 26

rods and cones convert light into neural impulses

Question 26

optic nerve

Answer 26

first part of visual pathway

Question 27

optic chiasm

Answer 27

where optic nerves meet second part of visual pathway