Unit 1 (Chapters 1 -3) Flashcards
Responds while a subject is watching another person complete a task and reacting as if they are completing it
- May be involved in determining the “why” of actions
- Learning from others while not directly experiencing
Mirror neurons
Visual cortex –> Parietal lobe
- dorsal
- action pathway
Describe the “where pathway”
Visual cortex –> Temporal lobe
- ventral
- perception pathway
Describe the what pathway
Determining the location of an object
What is the function of the “where pathway”
Determining the identity of an object
What is the function of the “what pathway”?
One’s estimate of the probability of a given outcome is influenced by 2 factors
1) prior probability
2) Likelihood of a given outcome
Bayesian Inference
Knowledge of what a given scene ordinarily contains
Scene Schema
Characteristics associated with functions carried out in different types of scenes.
Semantic regularities
We assume light comes from above
- Shadows affect our light perception
Light-from-above assumption
We perceive verticals and horizontals more easily than other orienations
Oblique effect
We perceive the world in a way that “most likely” makes sense based on past experience
Likelihood principle (Probabilistic Processing)
Speech segmentation studies using 8-month-olds.
- Infants pay more attention to novel stimuli rather than familiar stimuli
What was the study of transitional probabilities
Knowing which sound will likely follow another in a word
Transitional probablilities
The ability to tell when one word ends and another begins
Speech segmentation
Blue and red rectangles
- Image usually interpreted as the blue rectangle being in front of a red rectangle.
Helmhotz’s unconscious inference
Similar things appear grouped together
- Example: Dots in the shape of a square
Principle of similarity
Every stimulus pattern is seen so the structure is as simple as possible
- Example: Olympic Rings
Law of pragnaz/Simplicity
Lines tend to be seen as following the smoothest path
- Example: Rope
Principle of good continuation
Increase in firing when signal hits the center; decrease in firing when signal hits the sides (or vice versa)
Bar detectors
Increase in firing when the signal hits one side of the cell; decrease in firing on the other side of the cell
Edge detectors
Light falls on surrounding= increase in rate of firing
Light falls on center= decrease in rate of firing
Off-On cells
Light falls on center= increase in rate of firing
Light falls on surrounding area= decrease in rate of firing
On-Off cells
Concentration of cones
- Functions: Fine detail & directing attention
Fovea
Black and white, night vision
Rods
Color and Acuity (sharpness of detail)
Cones
People construct perceptions using information based on expectations
Top-down processing
Data-driven & relatively slow
- Infants use this
Direct perception Theories
- Relies on prior experiences for processing
- Fast process
Constructive perception theories
- Perception comes from stimuli in our environment
- Environment provides “data” for processing
- Parts are identified and put together to process
- Involve gestalt principles
Bottom-up processing
The task of determining the object responsible for a particular image on the retina
- Information collected by the retina could differ from reality (blurred or hidden objects)
Inverse projection problem
Experience resulting from stimulation of the senses
- The brain making an “educated guess” about what is happening in the surrounding world
Perception
Brain function that occurs when it’s at rest
Default Mode Network
How groups of neurons within the connectome function in relationships of cognition
- Determined by the amount of correlated neural activity in 2 brain areas
- Example: Motor and somatosensory are correlated
Functional connectivity (Correlated Neural Activity)
The brains “wiring diagram” created by axons that connect brain areas
Structural connectivity (Connectome)
Responds specifically to pictures of bodies & parts of bodies
Extrastriate body area (EBA)
Responds directly to places a person’s been
- Example of double dissociation
Parahippocampal place area (PPA)
Responds specifically to faces
- Damage here causes prosopagnosia (inability to recognize faces)
Fusiform face area (FFA)
Brain damage causes a loss in a particular function
Simple dissociation
Damage to one part of the brain causes function A to be absent while function B is present and vice versa
Double dissociation
Neurons that respond best to a specific stimulus
- lines, angles, edges, movement.
- oblique effect studies with kittens
Feature detectors
Structure of the brain changes with experience/environment
Experience-dependent plasticity
A system that creates representations of the world
Mind
Active potential sends a signal to other neurons, Resting potential sends nothing
What is the difference between resting potential and active potential?
Don’t send any signals to other neurons
-70 microvolts in the inside of the neuron compared to the outside
Resting potential
How a neuron sends a signal to the next neuron
+40 microvolts inside the neuron compared to outside the neuron
Action potential
Responds to dendrites of other cells
Terminal buttons
Long shaft that transmits electrical signal through the neuron
Axon
Extensions connected to cell body that receive info from other neurons
Dendrites
Connective area from one cell to the next
- Where communication occurs
Synapse
Contains the mechanisms that keep the cell alive
Cell body (Soma)
Cells specialized to create, receive, and transmit information all across the body
Neurons
Individual nerve cells transmit signals and are not continuously linked
- Established by research done with golgi staining
Neuron doctrine
Neurons are a continuous communication of signals
Nerve net theory
Study of the physiological basis of cognition
Cognitive Neuroscience
1) Humans have limited capacity for information processes
2) Humans are active information processors
3) Mental processes can be studied scientifically
4) Time and accuracy measures allow reasonable inferences
5) Human processing is computational
6) Humans use a symbol-manipulating system
Tenets of Cognitive Research
Off-On cells
Light falls on surrounding= decrease in rate of firing
Light alls on center= decrease in rate of firing
Constructive perception theory
- Replies on prior experiences for processing
- Fast process
- top-down
Factual memory
Semantic memory
Mind
A system that creates representations of the world
Who taught the first psychology course at Harvard?
William James
Information Processing Approach
Claims that the operations of the mind occur in stages; associated with insights associated with computers
What speeds up the reaction on the axon?
Myelin Sheath
Default Mode Network
Brain function that occurs when it’s at rest
The mental process
- Perception, memory, attention
Cognition
What discovery caused the emergence of cognitive neuroscience?
The fMRI
What is “shaping”?
Linking a sequence of simple behaviors to achieve a more complex behavior
Who developed the flow diagram?
-Attention model; mimicked computer processes
Daniel Broadbent
How was the oblique effect studied?
Studied visual stimuli in kittens.
- Kittens were exposed to vertical stimuli only, resulting in the kittens being unable to see diagonal and horizontal stimuli.
fMRI
- Relies on magnetic properties of blood
- No radiation
- Assesses blood flow
- More detailed than PET
Fusiform face area (FFA)
Responds specifically to faces
- Damage here causes prosopagnosia (inability to recognize faces)
Electrophysiology
Used to study electrical response of the nervous system
Which photoreceptor is light sensitive?
Rods
Top-down processing
People construct perceptions using information based on expectations
Who establishes the first scientific psychology lab?
Wilhem Wundt
Oblique effect
We perceive verticals and horizontals more easily than other orienations
- Measures blood flow to the brain
- Uses radiation (can be harmful)
- Shows what part of the brain is most active
PET scan
PET scan
- Measures blood flow to the brain
- Uses radiation (can be harmful)
- Shows what part of the brain is most active
What was the result of Ebbinghaus’s memory experiment?
Determined that memory begins to fade after 2 days
What was the study of transitional probabilities
Speech segmentation studies using 8-month-olds.
- Infants pay more attention to novel stimuli rather than familiar stimuli