Exam 2 Flashcards
Learning
Any relatively permanent change in behavior or knowledge that is due to past experience
Classical Conditioning
Type of learning in which a stimulus acquires the capacity to evoke a response that was originally evoked by another stimulus
(Forming associations based on past experiences)
Ivan Pavlov
- Presented dogs with meat powder
- Meat powder made dog salivate
- Bell to signal “dinner time”
- Over time, ringing bell made dogs salivate
Unconditioned Stimulus (UCS)
Stimulus that evokes any natural response without previous condition
“Unlearned stimulus”
Ex. Meat Powder
Unconditioned Response (UCR)
Unlearned reaction to unconditioned stimulus that occurs without previous conditioning
Ex. Salivating from food
Conditioned Stimulus (CD)
Previous stimulus that (through conditioning) acquired capacity to invoke conditioned response
“Learned stimulus”
Ex. Bell
Conditioned Response (CR)
Learned reaction to conditioned stimulus that occurs because of previous conditioning
Ex. Salivating from bell
Tips with UCS, UCR, CS, CR
UCR and CR are the same (like salivating). UCS and CS change (from meat powder to bell).
Examples of Conditioned Responses
Fear
Anxiety
Immune suppression (decrease in production of antibodies)
Sexual Arousal
Preparedness
Species-specific predispositions can be conditioned in certain ways
Little Albert
- John B. Watson
1. Albert played with white rat
2. Played gong sound which scared Albert
3. Little Albert became afraid of rat
4. Also became afraid of anything that LOOKED like the WHITE rat - Stimulus Generlization
Stimulus Generalization
Similar stimuli elicit the same CR as original CS
Ex. Little Albert scared of white rat > becoming scared of anything white
Stimulus Discrimination
When ONLY the original CS and NOT similar stimuli elicit a CR
Ex. Happy when seeing a kitty, but not happy when looking at other animals
Taste Aversion
- Associating the taste of a certain food with symptoms like sickness or vomiting
- Adaptation to the environment, survival response
Ex: Bad experience with drinking
Elicited Responses
Instinct/involuntary
Ex. Reflexes
Acquisition
Refers to initial stage of learning a new response tendency
Acquisition
Initial stage of learning a new response tendency
Depends on stimulus contiguity
Contiguity
Occurring together in time and space
Ex. “That Was Easy” button and IMMEDIATELY after, shot with gun
Extinction
Gradual Weakening and disappearance of a conditioned response tendency
SURPRESSES CR rather than ERASING
Spontaneous Recovery
Re-emergence of previously extinguished CR
Renewal Effect
Response is extinguished in a different environment than it was acquired
Extinguished response will reappear if animal is returned to the original environment where acquisition took place
Resistance to Extinction
Occurs when organism continues to make response after delivery of reinforce for it has been terminated
Operant Conditioning
Form of learning in which responses are controlled by consequences
B.F. Skinner
Skinner’s box
- Rat in box
- Rat hits lever
- Food dispenses
Positive reinforcement
Reinforcement
Occurs when an event following a response INCREASES tendency to make that response
Positive Reinforcement
-Followed by ADDITION of a rewarding stimulus
Ex. GIVING a dog a treat when doing a trick
Negative Reinforcement
-Followed by REMOVAL of an aversive stimulus
Ex. Parents STOP yelling at you when you do homework
Punishment
Occurs when event following a response WEAKENS tendency to make that response
DECREASES likelihood response will be repeated
Positive Punishment
Occurs when aversive is ADDED to situation
Ex. Spraying cat with water when ripping up couch
Negative Punishment
Occurs when something is TAKEN AWAY
Ex. Taking away car keys for a week
Primary reinforcers
Events that are inherently reinforcing because they satisfy biological needs
Secondary Reinforcers
- Conditioned
- Events that acquire reinforcing qualities by being associated with primary reinforcers
Contingencies
Circumstances or rules that determine whether responses lead to presentation of reinforces
Cumulative Recorder
- Creates graphic record of responding and reinforcement in a Skinner box as a function of time
- Roll of paper moving at steady rate underneath movable pen
Schedule of Reinforcement
Specific pattern of presentation of reinforcers over time
Continuous Reinforcement
Occurs when every instance of designated response is reinforced
Intermittent Reinforcement
Occurs when designated response is reinforced only some of the time
Fixed-Ratio (FR) schedule
Reinforcer is given after a fixed number of nonreinforced responses
Ex. Rat is reinforced after every tenth lever press
Variable-Ratio (VR) schedule
Reinforcer if given after a variable number of nonreinforced responses
Fixed-Interval (FI) Schedule
Reinforcer is given for the first response that occurs after a fixed time interval has elapsed
Ex. Rat is reinforced for first lever press after 2-minute interval.
Then must wait 2 minutes before being able to earn next reinforcement.
Variable-Interval (VI) Schedule
Reinforcer is given for the first response after a variable time interval has elapsed
Interval length varies around predetermined average
Shaping
• Reinforcement of successive approximations of desired behaviors
Ex. Pigeons don’t usually bowl
- Positive reinforcement with pecking
- Then direction
- Then chamber
- Then bowl
Observational Learning
Albert Bandura
Occurs when an organism’s responding is influenced by observation of others, who are called models
Bobo Doll
Bobo Doll
- Children saw an aggressive model on film
- Each group was then placed into a room with bobo dolls and observed through a one way mirror to see their response and how they treated the dolls
- Children who had seen the more aggressive model engaged in more violent conduct toward the dolls
TV violence on behavior
Showed how the observation of filmed models can influence the learning of aggressive behavior in children
Memory
Group of related mental processes that enable us to acquire, retain, retrieve information
False Memory
Elizabeth Loftus
Distorted or fabricated recollection of something that didn’t occur
Loftus’s Research
- Participants watch slides of a crime involving a screwdriver
- They then read a description of crime in which a “hammer” was described
- Vast majority remembered a hammer later
Misinformation effect
Misinformation effect
Falsely reconstructing memories based off of faulty information
Basic Memory Process
- Encoding
- Storage
- Retrieval
Encoding
Forming of memory code
Requires attention
Attention
Focusing awareness on narrowed range of stimuli or events
Types of Encoding
Structural Encoding
Phonemic Encoding
Semantic Encoding
Structural Encoding
Shallow processing that emphasizes the physical structure of the stimulus
Phonemic Encoding
Emphasizes what a word sounds like
Semantic Encoding
Meaning of verbal input
Elaboration
Linking of stimulus to other information at time of encoding
Visual Imagery
Creation of visual images to represent words to be remembered
Ex. The word “Juggler”
You envision a juggler
Concrete vs. Abstract Object
Visual Imagery
Concrete- physical object like a juggler
Abstract- usually intangible objects like truth
Dual-Coding Theory
Memory is enhanced by forming both semantic and visual codes since either can lead to recall
Storage Memory Types
Sensory, Short-Term, Long-Term
Sensory Memory
- Storage
- Brief, original stimuli
- It preserves information in its original sensory form for a brief time
- Afterimage
Short-Term Memory
- Storage
- Limited-Capacity storage that can maintain unrehearsed info for about 10-20 sec