Warren Lecture slide part 1.4 Flashcards
(12 cards)
Visual search and scanning
Completed in an organized efficient and predictable pattern driven by characteristics of the visual array and the task demands
- Reading Linear
- Landscape- circular
Visual attention
Sub-serves visual search/scanning
Critical component of visual processing
Varies from global to focal depending on visual analysis needed
- Global attention - getting the lay of the land
- Selective attention - focuses an attentional spotlight to gather specific detail
Can multitask global attention (to a point )
- But not selective attention
Foundation Functions
Oculomotor control - Provides perceptual stability Visual acuity - Provides visual clarity - ability to see details Visual field - Provides awareness of objects
All level must work together
Integrated network
Loss/impairment at one level affects functioning of all other levels
Putting it all together
Vision+Perception+Cognition
Memory prediction model
Developed by Jeff Hawkins to explain how neo - cortex works
Basic premise
Brain operates like a very large and sophisticated memory storage unit
- Empty at birth- we spedn our lifetime filling it through experience
Memory Prediction model
We use hierarchical pattern recognition system to guide us in our decision making about how to interact and use objects
- Both bottom up and top down
As patterns come in
- recognize low level details first
- then successively higher details until you make a decision about what to do
Level 1
Brain examines incoming sensory information
See something round, red, small, sweet smelling
Identifies it first as fruit then as an apple
Level 2
Examine features in greater detail
- Dark red mixed with green, very round, smooth, sweet smelling
- Recognize it as a fuji apple`
Level 3
Examine the perfection of the apple
- Completely red on the bottom, no cuts or bruises
- Recognize it as an acceptable apple
Level 4
Make a decision to purchase several
