Exam 2 - 3&4 Flashcards
Sensation
Detecting information and converting physical energy
Perception
Interpreting info
Organize and interpret
Prosopagnosia
Inability to recognize known faces
Bottom-Up Processing
Sensation to perception
Top-Down Processing
Using past experiences to fill in gaps
Association Areas
Neural networks in cities that integrate info
Transduce
Converting energy from one form to another
Cornea
Bend light
Front of eye
Iris
Dilates and constricts pupils
Retina
Contains photoreceptors
Photoreceptors
The sensory receptors for light
Rods
Black white and grey
For dark
Sensitive
Lots
Fires in groups
Cones
Fine details and color
Daytime
Not as sensitive
High Road
Thalamus to primary visual cortex
Low Road
Thalamus to amygdala
Blindsight
A person lacks explicit visual perception but can see in other ways
Absolute Thresholds
Minimum intensity to notice 50% of the time
Difference Threshold
Minimum change to notice change
Webers Law
Proportional constant
Dorsal Stream
Locates things in space
“Where” pathway
Ventral Stream
“What” pathway
Figures
The object of visual attention
Ground
The back/foreground that helps give the figure shape
Gestalt Psychologists
How “wholes” are constructed
Heuristic
Top-Down strategy allowing quick judgements
Monocular Cues
Use one eye
Distance for objects further than a few feet
Binocular Cues
Use both eyes
Detect and estimate distance (close)
Depth
Retinal Disparity
Images compared across retinas
Feature Detector Cells
Neurons that fire to specific shapes lines angles and properties
Supercell Clusters
Networks integrating feature into complex patterns
Context Effects
Perception is influenced by context
Perceptual Set
See what we expect to typically see
Phi Effect
Static stimuli presented in rapid succession interpreted as movement (ie animation)