PERCEPTION Flashcards
(24 cards)
What is sensation
Sense organs receive and transmit info
What is perception
brain interprets info
What is absolute threshold
Lowest intensity stimulus detected 50% of time
What is Signal Detection theory
factors that influence decisions whether a stimulus is there or not
Just Noticeable Difference (JND) or The difference threshold
the amount 2 stimuli must differ for them to be perceived 50% of the time
Sensory systems are particularly responsive to
changes in stimulation
What is Gate control theory
It takes into account the downward influences of the brain
What do endorphins do?
decrease pain
The study of sensory processes have helped people who are
blind, hearing impaired and those who have lost their hands
What are the 2 types of processing involved in perception
Bottom-up and top down
failure to perceive a stimulus when attending to another is called
inattentional blindness
the perceptual system is more vigilant when there is a
threat or danger
What are the 5 Gestalt principles of perception
figure-ground laws of similarity laws of proximity laws of closure laws of continuity
Perceptual sets involve our readiness to perceive based on what 4 things
Expectations
Assumptions
Motivations
Emotions
What is perceptual constancies
perceive familiar stimuli under changing conditions
What the the 3 perceptual constancies for vision
Shape
Brightness
Size
What are the 8 monocular cues to judge depth and distance
Light and Shadow Linear perspective
Interposition Height in the horizontal plane
Texture Clarity
relative size Motion parallax
What is binocular disparity
slightly different image viewed by each eye
What the the basis of perception of movement
Many cells in the V1 are pooled
What are illusions
Erroneous perceptions
What causes illusions
Perceptual constancies
Perceptual development involves what 2 things?
Physical maturation and learning
Can cultural factors influence perception
yes but mainly constant over most cultures
Normal visual development depends on
certain sensory experiences at early periods of development
