sensation and perception

Question 1

describe sensation

Answer 1

sensory receptor nerve endings detect stimuli, convert into neural impulses and transmit them to the brain (transduction)

Question 2

perception

Answer 2

brain organizes and interprets sensory messages

transforms into meaningful objects and events

Question 3

thresholds

ex of subliminal

Answer 3

stimuli that we can sense and perceive

subliminal - X-rays radio waves, uv etc

Question 4

abs threshold

Answer 4

point sensory info can/cannot be detected 50% of the time

Question 5

abs threshold vision

Answer 5

candle 48km away

Question 6

abs threshold hearing

Answer 6

ticking watch 6km away

Question 7

abs threshold taste

Answer 7

1tsp of sugar in 9L water

Question 8

abs threshold smell

Answer 8

1 drop perfume in a six room house

Question 9

abs threshold touch

Answer 9

force of bee wind falling onto check from 1 cm

Question 10

difference threshold

Answer 10

slightest + or - in physical stimulus required to produce and

Question 11

just noticeable difference

Answer 11

dif detected 50% of the time

Question 12

webers law

Answer 12

stimuli must differer by a constant minimum proportion or %

Question 13

signal detection theory

Answer 13

discriminating a stimulus from background noise

Question 14

sensory adaptation

Answer 14

less sensitive to unchanging stimulus

receptors steadily diminish firing rate

Question 15

sensory deprivation

Answer 15

relaxing short term

cause anxiety, bizarre thinking, hallucinations. depression, antisocial

Question 16

sensory overload

Answer 16

leads to feeling overwhelmed

natural tendency to withdraw

Question 17

wavelengths of eye

Answer 17

380 (violet) - 750 red