Chapter 6 Flashcards
Classical conditioning
Learning that occurs when a neutral stimulus (eg a tone) becomes associated with a stimulus (eg food) that naturally produces a behaviour. After the association is learned, the previously neutral stimulus is sufficient to produce the behaviour.
Key issues of classical conditioning is that is dependent on responses that are more or less automatically produced.
Unconditioned stimulus (US)
Something, such as food, that triggers a naturally occurring response.
Unconditioned response (UR)
Naturally occurring response, such as salivation, that follows the unconditioned stimulus.
Conditioned stimulus (CS)
A neutral stimulus that, after being repeatedly presented prior to the unconditioned stimulus, evokes a similar response as the conditioned stimulus.
The sound of the tone was the CS in Pavlov’s experiment.
Extinction
Refers to the reduction in responding that occurs when the conditioned stimulus is presented repeatedly without the unconditioned stimulus.
Spontaneous recovery
The increase in responding to the CS following a pause after extinction.
Although the behaviour can disappear, extinction is never complete If conditioning is attempted again, the animal will learn the new associations much faster than it did the first time.
Generalization
Refers to the tendency to respond to stimuli that resemble the original conditioned stimulus.
Ability to generalize has evolutionary significance. If we eat red berries that make us sick, we will think twice before we eat purple berries.
Discrimination
The flip side of generalization.
The tendency to respond differently to stimuli that are similar, but not identical.
Second-order, or higher-order conditioning
When an existing conditioned stimulus can serve as an unconditioned stimulus for a pairing with a new conditioned stimulus.
When Pavlov paired a black square repeatedly with the sound. Eventually, the dogs would salivate at the black square alone.
Phobia
A strong and irrational fear of a specific object, activity, or situation. When someone has a phobia about driving, the driving is the CS (conditioned stimulus) that creates the fear response.
People are evolutionary prepared to learn associations about being bitten by a snake, or falling from a tree over other, less scary ones (high locations, and open spaces).
PTSD
A severe anxiety disorder that can develop after exposure to a fearful event, such as the threat of death.
Operant conditioning
Learning that occurs based on consequences of behaviour, and can involve learning new actions.
Organism learns the consequences of its own actions.
Eg. dog rolls over on command because it has been praised for doing so in past.
Reinforcement and Punishment Influence Behaviour - Thorndike and Skinner
Thorndike observed cats placed in a “puzzle box” try to and escape and be rewarded with fish. At first, they scratched a bit, and eventually through multiple attempts, they attempted fewer ineffective responses before carrying out the successful escape - positive reinforcement.
After several trials, the cat learned to almost immediately make the correct response.
Law of Effect
The principle that responses that create a typically pleasant outcome in a situation are more likely to occur again in a similar situation.
On the contrary, responses that produce an unpleasant outcome are less likely to occur again.
Operant chambers (Skinner boxes)
A structure big enough to fit a rodent or bird and that contains a bar that the organism can press or peck to release food or water. Also contains a device to record the animal’s responses.
Eventually, like the cat boxes, the rats learned to press the food bar almost immediately.