Approaches- Behavioural Approach (Learning Theory) Flashcards
Behaviours claim that behaviour is learned and maintained through what ?
Environmental reinforcement.
What are the 4 main principles of behaviourism?
Behaviour is learned from experience
Only observable behaviour is measurable scientifically so should be the focus of testing
It is valid to study the behaviour of animals as they have the same learning processes as humans
We are born a “blank slate “ so there is no predetermined influence on behaviour.
What does this approach focus on ?
The behaviour of an individual as opposed to mental processes.
The approach suggests that all behaviour is learnt through experience in the same way as most other behaviours.
What 3 processes does the behavioural approach use?
Classical conditioning (association)
Operant conditioning (reinforcement)
Social learning theory- SLT (observation)
Who was the physiologist that discovered Classical conditioning ?
Ivan Pavlov.
He was looking at salivation in dogs in response to being fed, when he notices that his dogs would begin to salivate whenever he entered the room.
Pavlov started from the idea that there are some things that a dog does not need to learn. For example; dogs don’t learn to salivate whenever they see food.
This reflex is "hard wired" into the doc. In behaviourist terms, it is an unconditioned response. This can be written as Unconditioned stimulus (food) > unconditioned response (salivate)
Pavlov showed the existence of the unconditioned response by presenting a dog with a bowl of food and then measuring its salivary secretions.
However when Pavlov discovered that any object or event which the dogs learnt to associate with food (such as the lab assistant) would trigger the same response, he realised that he had made an important discovery.
Pavlov knew that somehow, the dogs in his lab had learned to associate food with his lab assistant. This must have been learned, because at one point the dogs didn’t do it, and there came a point where they started, so their behaviour has changed. A change in behaviour of this type must be the result of learning.
In behaviourist terms the lab assistant was originally a neutral stimulus. It is called neutral because it produces no response.
What had happened was that the neutral stimulus (the lab assistant) has become associated with an unconditioned stimulus (food).
Explain Pavlov’s experiment
Pavlov used a bell as his neutral stimulus.
Whenever he gave food to his dogs he rang a bell.
After a number of repeats of this procedure, he tried the bell on its own.
The bell on its own now caused an increase in salivation.
The dogs have learned an association between the bell and the food and a new behaviour has been learnt. Because this response was learned (or conditioned), it is called a conditioned response. The neutral stimulus has become a conditioned stimulus.
Pavlov found that for associations to be made, the two stimuli had to be present close together in time.
He called this the law of temporal contiguity.
If the time between the conditioned stimulus (bell) and the unconditioned stimulus (food) is too great, then learning will not occur.
What is the supporting evidence to Pavlov’s experiment?
Experiment in fear conditioning- Little Albert (WATSON AND RAYNOR, 1920).
Little Albert was an infant who learnt to have a fear of white rats through the process of classical conditioning in an experiment carried out by Watson and Raynor.
Originally Albert liked rats. However in order to induce a phobia, the researcher banged an iron rod behind Albert’s head when he was in the presence of a rat.
Eventually Albert began to fear rats because he associated them with the unpleasant loud noise.
What are the other discoveries Pavlov made along the way?
Stimulus generalisation
Pavlov found that if he varied the pitch and tone of the bell the dogs would still salivate. This meant that if a stimulus has characteristics in common with the conditioned stimulus, then the association will also be made with the new stimulus. For example, little Albert generalised his fear of white rats to anything white and fluffy, even Santa’s beard.
Stimulus discrimination
At some point there will be a cut off where a stimulus is too different to the conditioned stimulus to be generalised. For example, Little Albert, did not develop a fear of dogs (too different to white rats).
Time continuity
Pavlov found that the association can only be made if the unconditioned stimulus and neutral stimulus are presented at the same time, or around the same time. If the time lapse between presentations is too great then no association will be made.
Who was the law of effect generated by ? - operant conditioning
Thorndike (1898).
Thorndike observed cats managing to escape a puzzle box by pulling a lever. Cats began by escaping the box by chance (accidentally leaning on the lever) but once, they had learned to push the lever to escape, they continued to do so when out in the box.
Who explained that our behaviour is influenced by the consequences of our actions?
Skinner (1974)
We learn at an early age which of our actions are right and which are wrong.
Skinner believes that we do have such a thing as a mind, but that it is simply more productive to study observable behaviour rather than internal mental events.
skinner believe that the best way to understand behaviour is to look at the causes of an croon and its consequences. He called this approach operant conditioning.
Skinner is regarded as the father of operant conditioning.
Have our is reinforced when ?
Behaviour is not reinforced when?
It is reinforced when repeated (strengthened).
When it is not reinforced it tends to die out/ be extinguished (weakened).
Explain skinner’s (1948) experiment on animals which he placed in a “skinner box” and how it showed reinforcement
Skinner showed how positive reinforcement worked by placing a hungry rat in his Skinned box.
Th box contained a lever I’m the side and as the rat moved about the box it would accidentally knock the lever.
Immediately it did so a food pellet would drop into a container next to the lever.
The rats quickly learned to go straight to he lever after a few times of being put in the box.
The consequence of receiving food if they pressed the lever ensured that they would repeat the action again and again.
Positive reinforcement is therefore carrying out an action as you expect a reward (based on experience).
Skinner showed how negative reinforcement worked by pacing a rat in his Skinner box and then subjecting it to an unpleasant electric current which caused it some discomfort.
As the fat moved around the box it would accidentally knock the lever.
Immediately it did so the electric current would be switched off.
The rats quickly learned to go straight to the lever after a few times of being put in the box.
The consequence of escaping the electric current ensured that they would repeat the action again and again.
Negative reinforcement is therefore carrying it an action as oh expect to avoid a negative consequence (based on experience).
Skinner even taught the rats to avoid the electric current by turning in a light just before the electric current came on. The rats soon learned to press the lever when the light came on because they knew that this would stop the electric current being switched on.
These two learned responses are known as Escape learning and avoidance learning.
What does the term operant conditioning means?
It means roughly changing of behaviour by the use of reinforcement which is given after the desired response.
Explain how positive reinforcement strengthens a behaviour ?
By providing a consequence an individual finds rewarding.
For example if your teacher gives a £5 each time you complete your homework (I.e. A reward) you are more likely to repeat this behaviour in the future, this strengthening the behaviour of completing your homework.
What is negative reinforcement?
The removal o an unpleasant reinforced can also strengthen behaviour. Negative reinforcement strengthens behaviour because it stops or removes an unpleasant experience.
For example if you do not complete your homework you give your teacher £5. You will complete your homework to avoid paying £5, this strengthening the behaviour of completing your homework.