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Conditioning
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Ivan Pavlov Russian scientist – he wanted to learn about the relationship between digestion and the nervous system Accidentally discovered the principles of Classical Conditioning
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Stimulus – something that produces a reaction or response. Unconditioned stimulus Unconditioned response Neutral stimulus Conditioned stimulus
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Taste Aversion – 1970’s John Garcia discovered that if a negative experience took place with found within several hours of consumption, people would develop an aversion to that food or taste.
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Little Albert J.B. Watson used little children Paired a nice fuzzy white rat with a loud noise to frighten the children Children became frightened of the rats even without the noise, conditioning had occurred They became frightened of other fuzzy animals, even stuffed animals – this is called generalization Sometimes the child would respond differently to a dog than the mouse – this is called discrimination
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Extinction – when a Conditioned Stimulus no longer brings about a Conditioned Response (bell without food) Spontaneous Recovery – after extinction has occurred, CS is done again and it brings about the CR (often happens with music)
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Applications of the Extinction Principle Flooding Systematic Desensitization http://understandingshyness.wordpress.com/2009/12/08/systematic-desensitization-therapy/
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Other Conditioning treatments Counter-conditioning – 1924 Mary Jones – You can counter-condition fears by pleasant stimuli Bell and Pad Method
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Operant Conditioning The idea that people (or animals) learn to do and not to do things by the result that they get.
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B.F. Skinner Reinforcement – Primary Reinforcers – Secondary Reinforcers – Skinner Box
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Reinforcers Primary Reinforcers – Due to biological makeup of organism – food, warmth, water Secondary Reinforcers – must be learned – money, social approval – sometimes functions through long lines of association (i.e. grades)
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Types of Reinforcement Positive reinforcement – desires to increase the frequency of a behavior – Food, fun activities, social approval – Disadvantages: only works if the reinforcer is desired
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Negative Reinforcement – also desires to increase the frequency of a behavior – behavior reinforced because something unwanted stops happening (i.e. your tired, you go to bed) – Disadvantage: just like positive reinforcement
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Rewards – fairly interchangeable with Positive Reinforcement Punishment – seeks to decrease the frequency of a behavior – behavior decreases or stops upon the application of punishment
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Disadvantages of Punishment Does not necessarily teach acceptable behavior. only works when guaranteed severe punishments may cause a person to simply leave the situation Context must always be apparent sometimes is accompanied by unseen benefits that make the behavior increase rather than decrease
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On the other hand… “Spare the rod and spoil the child”
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Schedules of Reinforcement Continuous reinforcement – rein. applied every time behavior occurs – quickest way to reinforce but if reinforcement stops behavior quickly stops as well Partial reinforcement – Interval Schedules – Ratio Schedules
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Interval Schedules Has to do with time Fixed – reinforcement available only after a fixed amount of time has passed Variable – reinforcement available only after time has passed but time is variable
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Ratio Schedules Has to do with number of time behavior occurs in relation to reinforcement Continuous – 1:1 Fixed – x:1x is constant Variable – x:1,x is variable
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