Task 4 - Classical Conditioning Flashcards
Unconditioned stimulus (US
a stimulus that naturally evokes some response (f.e. Food since is evoked a natural response, such as salivation)
Unconditioned response (UR)
(their relationship does not depend on learning) they both occur unconditionally without prior training – the naturally occurring response to an unconditioned stimulus
Appetitive conditioning
the name of the conditioning when the unconditioned stimulus is a positive event (such as food delivery for Pavlov’s dog or ice cream for Moira)
- In general, appetitive conditioning consists of learning to predict something that satisfies a desire or appetite
Aversive conditioning
Conditioning in which the US is a negative event (such as a shock or an airpuff to the eye)
Eyeblink conditioning
A classical conditioning procedure in which the Unconditioned Stimulus is an airpuff to the eye and the conditioned and unconditioned responses are eye blinks – perhaps the most thoroughly studied form of motor reflex
Tolerance
A decrease in reaction to a drug so that larger doses are required to achieve the same effect
Homeostasis
the tendency of the body (including the brain) to gravitate toward a state of equilibrium or balance
Extinction
the process of reducing a learned response to a stimulus by ceasing to pair that stimulus with a reward or punishment
- Extinction does not involve the total loss of what was previously learned
Delay
(less successful) - f.e. Not bringing the food out straight away
Compound conditioning
The simultaneous conditioning of two cues, usually presented at the same time
- Many studies have shown that the tone will have less association with the US if it is trained in compound than if it had been trained alone in a tone
Overshadowing
occurs when a more salient cue within a compound acquires far more of the share of attention and learning than the less salient cue – A effect seen in compound conditioning when a more salient cue within a compound acquires more association strength, and is thus more strongly conditioned, than does the less salient cue
Blocking
a two-phase training paradigm in which prior training to one cue (CS1 → US) blocks later learning of a second cue when the two are paired together in the second phase of the training (CS1 + CS2 → US)
- it demonstrates that classical conditioning occurs only when a cue is both a useful and a nonredundant predictor of the future
Prediction error (Rescorla-Wagner Model of Conditioning)
the difference between what was predicted and what actually occurred
Error-correction learning
a mathematical specification of the conditions for learning that holds that the degree to which an outcome is surprising modulates the amount of learning that takes place
Three key situations to consider in interpreting a prediction error
- A situation in which either no Conditioned Stimulus or a novel Conditioned Stimulus is presented followed by a Unconditioned stimulus, so that the unconditioned stimulus will be unexpected → this is considered a positive prediction error because there is more Unconditioned Stimulus than expected
- a well-trained CS is followed by the expected US, there is no error in prediction (the US was fully predicted by prior presentation of the CS), and thus no new learning is expected
- if the CS predicts a US and the US does not occur, the prediction error is considered negative, and Rescorla and Wagner expect it to be followed by a decrease in the CS US association