Depth Perception and perceptual constancy Flashcards
Figure and Ground
Perceiving objects as distinct from their surroundings
Proximity
Group nearby figures together
Continuity
Perceive smooth and continuous lines
Closure
We fill gaps to create the whole object
Similarity
Items that share a common feature
Connectedness
Items that are physically touching
Monocular cues
Depth cues such as interposition and linear perspective
What are the types of Monocular cues?
Relative size, Relative motion, interposition, Relative Height, linear perspective, light and shadow, relative clarity, and texture gradient
Relative Height
Perceiving high objects as further away Ex: House is farther from trees and lake because they are positioned more up
Relative Motion
As we move, objects that we see also move
Ex: When you are riding a bus and it goes forward, you see houses move backward
Relative Size
They are all same images, but if one of the images is smaller than the others, people perceive it as being farther away
Ex: There are two soccer balls. One large and one smaller and towards the right. The one that is smaller and on the right is perceived farther
Linear Perspective
Parallel lines seem to meet a distance
Ex: Train tracks that keep going straight but as it goes straight the tracks get smaller which makes them seem farther
Interposition
To come between. If one object partially blocks our view of another, we perceive it as closer
Ex:
Light and Shadow
Shading produces a sense of depth while the light is shown above
Relative clarity
Objects that appear sharp, clear, and detailed are seen closer than hazy objects
Texture gradient
Distortion in size which closer objects have compared to objects farther away
What are four types of perceptual constancy?
Color constancy, shape constancy, size constancy, brightness constancy
Color constancy
Perceiving familiar objects as having consistent color
Ex: The apple is still red regardless of how bright or dark the room is
Shape constancy
Perceiving familiar objects as having consistent shape
Ex: The ball is still the same shape eventhough it is bounced
Size constancy
Perceiving objects as having a constant size
Ex: A bus far from the street would have the same zise
Brightness constancy
Perceive objects as having a constant brightness
Ex: Reading notes in dim light
Sensory Transduction
Taking sensory information and transforming it as a neural impulse
Absolute Threshold
The minimum amount of energy stimulus that will produce a sensation 50% of the time
What is the relationship between absolute threshold and energy?
The less absolute threshold is used, the better you will be able to detect a stimulus