Task 4 - classical conditioning Flashcards
Unconditioned stimulus
-biologically significant stimulus that elicits a natural reflective response
Unconditioned response
Natural reflex elicited by US
Conditioned Stimulus
-cue that was previously neutral but that through training becomes associated with US
Conditioned response
-learned response to CS that has been paired with US
Aversive /appetitive conditioning
- US is unpleasant or negative event
- US is a positive event
Conditioned compensatory response
- results in tolerance
- decrease in reaction to a drug (or something else) , so that larger doses are required to have a similar effect
- occurs primarily in body system that has mechanism for homeostasis (tendency to gravitate towards state of equilibrium)
Extinction
-reducing a learned response to a stimulus , by stopping to pair that stimulus with a reward/punishment
- > association that became ‘inhibited’ following extinction will not be lost in its entirety
- > in fact, learned response is not gone, just unexpressed
- extinction is not forgetting!
- extinction = overwriting/replacing
Compound conditioning
- Simultaneously conditioning of two cues , usually presented at same time
- two cues compete against each other
- neither produces as much learning as it would have ( if trained alone)
- compound cues share predictive value
- > learning is faster with compound cues
- learning rate is faster -> steep learning curve
Overshadowing
-effect seen in compound conditioning when a more salient cue within a compound acquires more association strength than less salient cue
Acquisition
- the CR gets stronger gradually
- if CS proves to be predictive of US then CR follows CS, also without US n
Tolerance
-compensatory response in preparation to US , in an attempt to maintain a balanced state (homeostasis)
Evidence:
-heart rate drops when awaiting an adrenaline injection, diminishing the heart rising effect of adrenaline
Blocking
-a stimulus can only become an CS if it brings ne predictive value
Evidence:
- light and sound are followed by a shock
- > both stare the predictive power
- if only light is followed by the shock and sound is added later
- > sound will not add value to prediction
No Error = No learning
Rescola - Wagner Model general idea
- if you are surprised, you are learning
- US occurs unexpectedly + positive error ( E) -> increase in association of CS and US
-US does not occur as expected = negative E -> decrease in association of CS and US
Prediction Error
-determines how much learning (change in association) occurs
Error - correction - rule
- with trials of learning the prediction error gets reduced
- learning occurs incrementally
