Exhaustive Guide to Classical, Operant, and Cognitive Learning Theories
Definition and Foundations of Learning
Definition of Learning: Learning is defined as a relatively permanent change in behavior brought about by experience or practice.
Relatively Permanent: This phrasing indicates that while a behavior is learned and sustained, it is not necessarily immutable; a person can "unlearn" something as well as learn it.
Hypothetical Classroom Scenario:
An instructor turns off the lights before beginning every lecture.
Initially, the students have no reaction to the lights going out.
Over time, students begin to associate the lights going out with the beginning of a lecture, leading to an automatic groan ("something unpleasant that I have to endure").
In a real-world extension, a student develops a crush on a classmate. If they meet outside of class and she turns off a light, he instinctively groans, illustrating how a conditioned response can negatively impact personal interactions.
Classical Conditioning and Pavlovian Research
Ivan Pavlov: A Russian physiologist who lived from to . His foundational experiments were conducted in .
Discovery of Salivation: While measuring the salivation of dogs as they consumed food, Pavlov noticed they began salivating before the food appeared. They associated the sounds of the assistants' footsteps with the arrival of food.
Household Analogies:
A dog getting excited when a owner goes to a particular cupboard.
A cat becoming excited at the sound of a food can being opened.
The Structure of Classical Conditioning:
Unconditioned Stimulus (UCS): A stimulus that naturally and automatically triggers a response (e.g., food).
Unconditioned Response (UCR): The unlearned, naturally occurring response to the unconditioned stimulus (e.g., salivation when exposed to food).
Neutral Stimulus (NS): A stimulus that initially elicits no response (e.g., a bell).
Conditioned Stimulus (CS): A previously neutral stimulus that, after association with an unconditioned stimulus, comes to trigger a conditioned response.
Conditioned Response (CR): The learned response to a previously neutral (but now conditioned) stimulus.
Key Note: The Unconditioned Response and the Conditioned Response are always the same behavior (e.g., salivation); the difference lies in what stimulus triggers them.
Core Concepts in Conditioning:
Reflexes: Classical conditioning deals with reflexive, involuntary types of behaviors.
Pairings (Associations): The cognitive link made between two stimuli.
Contiguity: Being next to each other in time or space. Stimuli are paired contiguously to form an association.
Taste Aversion: A common occurrence where eating something that makes one sick leads to a future response of nausea or illness just by smelling or thinking about that specific food.
The Little Albert Experiment and Ethical Implications
John Watson and Rosalie Rayner: Conducted a controversial experiment to condition fear into a child. Watson and Rayner were eventually forced out of academia due to an affair; Watson later worked in New York using conditioning principles in advertising.
The Experiment:
The subject was a -month-old baby known as Little Albert.
Albert was initially comfortable with a white rat (Neutral Stimulus).
Watson used a hammer to bang on a metal pipe (Unconditioned Stimulus) every time the rat was presented.
The loud noise caused a fear response (Unconditioned Response).
Eventually, the rat alone (Conditioned Stimulus) elicited fear and cringing (Conditioned Response).
Generalization vs. Discrimination:
Generalization: Little Albert began to fear everything that was white and furry (e.g., rabbits, fur masks, or a Santa Claus beard).
Discrimination: The ability to tell the difference between similar stimuli. If Albert loved the rat but feared the rabbit, he would be exhibiting discrimination.
Ethics and Credibility: The experiment is deemed not credible today because:
It is unethical to cause fear in a child.
Watson did not collect truly observable, objective data.
Modern research requires approval from an Institutional Review Board (IRB) to ensure ethical standards.
Acquisition, Extinction, and Recovery
Acquisition Trials: The process of developing a learned response.
Delayed Conditioning (Delayed Approach): Presenting the neutral stimulus first, followed by the unconditioned stimulus with a brief overlap. This is considered the most effective method (e.g., ringing a bell, waiting to seconds, then giving food).
Simultaneous Conditioning: Presenting the NS and UCS at the same time.
Backward Conditioning: Presenting the UCS before the NS; this generally does not work for establishing associations.
Extinction Trials: If the Conditioned Stimulus (bell) is presented repeatedly without the Unconditioned Stimulus (food), the behavior eventually weakens and goes away.
Spontaneous Recovery: The sudden reappearance of an extinguished response after a period of non-exposure. Pavlov believed the fear/association fades but never truly disappears.
Biological Basis: A neural network is formed in the brain during conditioning. Even if other information builds up around it, the original connection remains part of the brain's physical structure.
Higher Order (Secondary) Conditioning: When a new neutral stimulus is paired with an existing conditioned stimulus to create a second, weaker conditioned stimulus.
Example: Pavlov added a light to the bell.
Example: A child learns that a certain TV show plays at the same time every day that a garage door opens and parents come home. The TV show itself begins to trigger excitement.
Limitations of Classical Conditioning
Free Will: Classical conditioning does not always work; humans possess free will and may choose not to respond to associations.
Instinctive Drift: Identified by Keller and Marian Breland (a husband-wife research team). They found that learned behaviors can be overridden by innate instincts over time.
Raccoon Experiment: The Brelands tried to train a raccoon to put coins in a piggy bank for a commercial. The raccoon began to dip the coins in and out of the bank with its paws, mimicking the instinct to dip and wash food in water before eating. This instinct interfered with the conditioned behavior.
Operant Conditioning Principles
Core Concepts: Unlike classical conditioning (reflexes), operant conditioning involves an individual acting on their environment. The environment provides feedback which determines future behavior.
Edward Thorndike (1890s): Introduced "Instrumental Conditioning."
Trial and Error: Behavior in a novel situation before reinforcement is received.
Puzzle Boxes: Thorndike used cats in boxes. The cats had to pull a string or push a lever to escape and get food.
Law of Effect: If a behavior results in a positive outcome, it is "stamped in" (the brain wires itself to repeat it). If it results in an unpleasant outcome, it is "stamped out."
B.F. Skinner: The most prominent figure in operant behaviorism.
Science of Behavior: Skinner believed all behavior is predictable and determined by history of rewards and punishments.
Writings:
Walden Two: A fiction novel about a utopian community based on behavioral principles.
Beyond Freedom and Dignity: Non-fiction stating his theories.
Agency: Skinner argued that "autonomous man," free will, and agency are "explanatory fictions" we used before we understood the true causes of behavior.
The Skinner Box (Operant Box): A chamber with levers or buttons for an animal to press, and a floor that could provide aversive stimuli (shocks).
The Baby Tender (Air Crib): A glass-enclosed, temperature-and-humidity-controlled cabinet Skinner designed for his daughter.
The device used a crank to change sheets easily.
Urban legends claimed Skinner's daughter developed psychological issues from being raised in it, but these were debunked. About babies were studied, and all turned out fine. Public rejection was likely due to its resemblance to lab equipment.
Reinforcement and Punishment
Discriminative Stimulus: A signal that a reinforcement is available (e.g., a green traffic light signaling it is time to move).
Reinforcers:
Primary Reinforcers: Naturally satisfying and unlearned (e.g., food, water).
Secondary (Conditioned) Reinforcers: Learned through association with primary reinforcers (e.g., money allows you to buy food).
Accidental Reinforcement: How superstitions are formed. If a person hits a home run after putting on their left sock first, they associate the action with the result.
Types of Operant Consequences:
Positive Reinforcement: Adding something pleasant to increase a behavior (e.g., stars, trophies, praise).
Negative Reinforcement: Removing or avoiding an aversive (unpleasant) stimulus to increase a behavior. It is NOT punishment.
Example: Rubbing a towel to remove wetness from hands.
Example: Turning on wipers to clear rain.
Example: Stopping a loud alarm clock.
Example: Ignoring a caller ID to avoid a person you don't like.
Punishment by Application: Adding something unpleasant to stop a behavior (e.g., washing a mouth out with soap, yelling).
Punishment by Removal: Taking away something pleasant to stop a behavior (e.g., no TV, taking away a ball).
Schedules of Reinforcement
Continuous Reinforcement: Reinforcing the behavior every single time it happens. This leads to fast learning but rapid extinction if reinforcement stops.
Partial (Intermittent) Reinforcement:
Fixed Ratio: Reinforcement after a set number of behaviors (e.g., every quiz). This leads to increased production as the deadline approaches.
Variable Ratio: Reinforcement after an unpredictable number of behaviors (e.g., slot machines). This is extremely powerful and resistant to extinction.
Fixed Interval: Reinforcement after a set amount of time (e.g., a paycheck every weeks).
Variable Interval: Reinforcement after an unpredictable amount of time (e.g., waiting for a fish to bite or a compliment).
Advanced Training and Principles
Shaping (Successive Approximation): A step-by-step process of reinforcing parts of a behavior until the total behavior is learned.
Chaining: Linking discrete behaviors together (e.g., in swimming: breathing, arm movements, and leg movements).
Premack Principle (Grandma's Rule): Requiring a person to do something unpleasant to gain access to a positive reinforcer (e.g., mowing the lawn to use the car).
Cognitive Aspects and Insight Learning
Edward Tolman and Cognitive Maps:
Place Learning vs. Response Learning: Tolman believed learning was more than just stimulus-response.
Latent Learning: Learning that is hidden or stored until needed.
Cognitive Maps: Internal mental representations of spatial layouts (e.g., knowing the floor plan of your house).
Rat Research: Tolman bred "maze-bright" rats (behavioral genetics). He found that rats allowed to wander a maze for days without food were just as efficient at finding food once introduced as those conditioned with rewards from the start.
Freudian Application: Tolman used maps to explain regression (returning to familiar mental maps) and fixation (getting stuck on a well-established map).
Wolfgang Kohler and Insight Learning:
Location: Canary Island Anthropoid Station.
Sultan the Chimpanzee: Kohler studied nine chimps. Sultan was presented with a banana out of reach and two sticks that could be joined.
The "Aha!" Moment: Rather than trial and error or reinforcement, Sultan sat and thought until he had a sudden "insight" to join the sticks.
Insight: The sudden coming together of elements in the environment to solve a problem.
Observational and Social Learning
Albert Bandura: Key researcher who focused on how we learn by watching others.
Bobo Doll Experiment: Children watched adults act aggressively toward an inflatable doll. When left alone, the children imitated the exact violent behaviors they saw.
Mirror Cells (Mirror Neurons): Controversial brain cells that activate both when an individual performs an action and when they observe someone else performing it.
Four Characteristics of Observational Learning:
Attention: You must intently watch the model's behavior.
Memory (Retention): You must remember what was shown.
Action (Motor Reproduction): You must transform mental representations into physical activity (e.g., serving a tennis ball).
Motivation: You must have a reason or desire to replicate the behavior.