behavior › you learn by observing change › connections between neurons are formed relatively...
TRANSCRIPT
LEARNING
Learning Behavior
› You learn by observing Change
› Connections between neurons are formed Relatively enduring
› Change is usually permanent Practice and experience
› Reinforces
Learning Stimulus – produces activity in an
organism› Anything perceived by the senses – smell,
touch, taste, sight, hearing Response – reaction of an organism to
a stimulus› Stimulus: Bright light› Response: Close/cover your eyes
Aristotle Greek philosopher 4th Century B. C. Laws of Association
› Associations are mental connections between two stimuli
Ivan Pavlov Russian psychologist Won the Nobel Peace
Prize Classical
Conditioning Conducted his
research on dogs
Natural Response Unconditioned Response (UCR)
› unlearned, occurs naturally, no conditioning or training are needed in order to produce this response
Unconditioned Stimulus (UCS) › the stimulus that causes the UCR
Learned Response Conditioned response (CR)
› Learned response
Conditioned stimulus (CS)› A stimulus presented that wouldn’t
normally cause a certain response
Pavlov’s Experiment
What happens when a dog is given food ?› Gets excited, jumps around, salivates
What happens when you ring a bell?› Gets excited jumps around, NO salivating
What happens if every time you give a dog food you rang a bell?› The dog will eventually salivate
What happens now if you ring the bell?› The dog will salivate
Pavlov’s Experiment UCS
› Food UCR
› Salivation
CS › Bell
CR › Salivation
Why does the dog now salivate to the sound of the bell?› The dog has learned to associate the bell with food – he
learned something!
Pavlov’s Observations
The following 4 areas play a role in classical conditioning› Time between CS and UCS› Repetition› Extinction› Generalization and discrimination
Applications of Classical Conditioning
1. Counterconditioning› Changing a negative response to a positive
one 2. Flooding
› Having a person face their fear continuously
3. Desensitization› Gradually exposing a person to something
they fear
Operant Conditioning
A behavior is learned in connection with a reward or punishment
E.L. Thorndike Operant conditioning Placed a cat in a “puzzle box”
› One lever in the box would open the door› The cat would claw around and eventually find the
lever› Once the door opened the cat was able to get out
and received a reward (food)› The cat was put back in the box, it would claw
around again and find the lever, get out of the box and receive the reward
› After a number of trials the cat new exactly where to go to get his reward
B.F. Skinner Behavior psychologist Respondent behavior
› The response that is involuntary, it doesn’t have to be learned, it happens automatically
Operant behavior› Voluntary behavior, choosing to do
something Reinforcement
› Encourages or discourages a behavior
Principles of Operant Conditioning
Any response followed by a reinforcing stimulus tends to be repeated
A stimulus is considered reinforcing when it increases the rate of an operant behavior
Primary and Secondary Reinforcements
Primary › A stimulus that is tied
to some aspect of survival (food, water)
Secondary› A stimulus that is not
necessary for survival, (money, praise)
Changes in Operant Conditioning
Generalization › when stimuli are similar but not identical,
and the CR still occurs Discrimination
› learning the difference between two similar stimuli
Extinction › getting rid of a response
Shaping
A method of refining a behavior by reinforcing behaviors that are close to the desired behavior
Eventually the reinforcements will lead to the actual desired behavior
Chaining Teaching steps to a desired behavior
separately
Once each behavior is linked together you get the actual desired behavior
Schedules of Reinforcement
How often must a person receive reinforcement for a behavior to continue?
Fixed Schedule› Given consistently
Variable Schedule › Given at different rates or times
Schedules of Reinforcement
Ratio Schedule › Based on the number of times a behavior
occurs and the rate at which it’s reinforced Interval Schedule
› Reinforcement is given after a specific amount of time
Biology of Conditioning
Taste Aversion› Develop a dislike for a particular food if it
resulted in an illness (biological preparedness)
› Adaptive behavior Instinctual Drift
› Instincts› We drift towards certain things because of
inborn tendencies
Latent Learning Edward Tolman
› Individuals interact with the environment› Form associations between two different
stimuli› Cognitive maps – associations made
previously that can be used at a later time› Latent learning – using a previously
learned behavior at a later time, but when you learned it, it wasn’t obvious that you could use it for something else
Insight Learning
Wolfgang Kohler Figuring out a method or behavior
› Placed chimpanzees in cages with bananas hanging from the ceiling
› In the cages were several boxes› Chimps tried jumping and climbing to get
to the bananas› After a while they studied the boxes› They then stacked the boxes, climbed on
top and got the bananas
Cognitive Theories
Cognition › Thinking› Memory formation› Learning› Problem solving
Jean Piaget
French psychologist Mental abilities develop as a function of
biological development & experience Schemas contain info. About
› Objects› Actions› Events› Relationships
Example: Morning routine
Jean Piaget
Children are already born with certain schema› Suck› Reach › Look› Grasp
Stages of Cognitive Development
1. Sensorimotor (birth-2 years)› Differentiates self from objects› Object permanence – things continue to
exist even when they are no longer present to the senses
2. Preoperational (2-7 years)› Use language, represent objects with
words
Stages of Cognitive Development 3. Concrete operational (7-12)
› Think logically› Classifies objects by several features
(size, color, shape) 4. Formal operational (12 & up)
› Become concerned with the hypothetical, the present, and the future
Factors Affecting Learning
Meaningfulness› Words or ideas that have personal meaning
Transfer› Learning new information, but being able to use it
in real world situations Chemical Influence
› Stimulants – caffeine, soda, coffee – inc. brain chemicals and may allow for more rapid learning
› Depressants – alcohol – reduce nerve firing and the potential for learning
Social or Observational Learning
Albert Bandura› Direct experience› Vicarious experience - observing
Bandura’s Research Divided preschool children into 2 groups
› One watched a film of an adult playing quietly with a doll
› The other watched a film of an adult playing aggressively with the doll Punching, kicking, throwing it around the
room Later, when the children were allowed
to play with toys, those who had seen the more aggressive film were more than twice as likely to act aggressively
Processes in Observational Learning
Acquisition or modification of a behavior after at least one exposure to the behavior Attention Retention Motor Reproduction Processes Motivation
Violence in the Media
Observational Learning› Media violence can encourage violent
behavior
› Children brought up in a home where there is no aggressive behavior or punishment are usually less likely to exhibit violent behaviors seen in the media.
Current Approaches
Individual differences in cognitive processes› The big picture› Minor details› Hands-on › Think or reasoning
Factors that Influence Learning
Emotions› Advantageous to learning› If emotions are overwhelming, little
learning takes place Evolutionary
› Processes are inborn and are turned on by situations we face each day
Factors the Influence Learning
Culture› Values – learning depends on your family
values› Perceptual Processes – how do you
perceive what you come into contact with› Intelligence – varies among people