Rescorla Wagner Model and Learning and The Brain - Week 2 Flashcards
The Rescorla-Wagner
- Better than the Hull Spence
- Predicts that B will lose associative strength and become inhibitory
Rescorla-Wagner (Blocking)
When A=Food, Only A during AB will maintain associative strength to food, while B will have no associative strength to Food
Condition Inhibition (Rescorla-Wagner)
If A=Food, but AB=No Food then B acts as an inhibitor to A
2 Tests of Conditioned Inhibition
- Summation test
- Retardation Test
Summation Test
A=Food, C=Food, B=No Food, AB=No Food therefore CB=No Food
B=Conditioned Inhibitor
Retardation Test (Rescorla-Wagner)
A=Food, AB=No food, however B=Food.
Because B was seen as an initial inhibitor, learning that B=Food was slower
Prediction Error
Actual Outcome - Expected Outcome
-Extent to which organism was unable to predict outcome
Dopamine Neurons involve:
Learning through reward
- More dopamine=Reward
- Less dopamine=Punisment
Dopamine Neurons increase activity when:
A conditioned stimulus is presented
Different levels of prediction error
- Positive Prediction-Error: Reward given, not expected
- Zero Prediction-Error:Reward given, Expected
- Negative Prediction-Error: No reward, expected
Rescorla-Wagner (Memory)
While learning new things, old things will be forgotten
Hippocampus
- Fast Learning
- Stores memory temporarily
-Damage will cause inability to form new memories, but ability to remember past memories
Neocortex
- Learns slowly
- Permanently Stored
-Damage will cause ability to form new memories, but inability to recall past memories
Synaptic Plasticity
The more you learn, the more efficient synapses between Neurons become
Amygdala
Stores Fearful Memories
