Learning: Principles, Processes, and Applications in Psychology

Topic 6: Learning

Introduction

Learning is a fundamental concept in psychology, referring to the process by which experience produces a relatively permanent change in behaviour or knowledge. This topic explores the mechanisms, types, and influences on learning, including classical and operant conditioning, cognitive approaches, and the impact of biological and social factors.

Unlearned Behaviours

Reflexes

Reflexes are automatic, involuntary responses to specific stimuli. They are innate and essential for survival, involving primitive parts of the central nervous system (CNS), such as the brainstem.

• Protective & Essential: Reflexes help protect the organism from harm (e.g., withdrawal reflex).

• Examples: Pupillary light reflex, startle reflex, withdrawal reflex, scratch reflex.

Instincts

Instincts are innate drives or tendencies that lead to particular patterns of behaviour. They are more complex than reflexes and involve the movement of the organism as a whole.

• Examples: Sexual activity, migration in birds.

• Involve higher brain centers: Instincts require more advanced neural processing than reflexes.

What is Learning?

Definition and Types

Learning is a relatively permanent change in behaviour or knowledge resulting from experience. It involves acquiring skills or knowledge through both conscious and unconscious processes.

• Habituation: Decreased response to a repeated, benign stimulus.

• Sensitization: Increased response to a repeated, intense or noxious stimulus.

Habituation and Sensitization

Habituation

Habituation is a simple form of learning in which repeated exposure to a stimulus results in a gradual reduction in response.

• Example: A child becomes less startled by a loud noise over time.

Sensitization

Sensitization occurs when repeated exposure to a stimulus increases the organism's response.

• Example: A person becomes more sensitive to criticism after repeated negative feedback.

Classical vs. Operant Conditioning

Overview

Both classical and operant conditioning are fundamental learning processes, but they differ in their mechanisms.

• Classical Conditioning: Learning to associate an involuntary response with a stimulus.

• Operant Conditioning: Learning to associate a voluntary behaviour with a consequence (reinforcement or punishment).

Classical Conditioning

Principles and Components

Classical conditioning is the process by which organisms learn to associate stimuli and anticipate events. Ivan Pavlov's research on the digestive system of dogs led to the discovery of classical conditioning.

• Unconditioned Response (UCR): Natural, unlearned reaction to a stimulus (e.g., salivation to food).

• Unconditioned Stimulus (UCS): Stimulus that naturally triggers a response (e.g., food).

• Neutral Stimulus (NS): Stimulus that does not elicit a response before conditioning (e.g., bell).

• Conditioned Stimulus (CS): Previously neutral stimulus that, after association with UCS, triggers a conditioned response.

• Conditioned Response (CR): Learned response to the conditioned stimulus.

Example: Pavlov's dogs learned to salivate (CR) to the sound of a bell (CS) after it was repeatedly paired with food (UCS).

Acquisition, Extinction, and Spontaneous Recovery

• Acquisition: The initial stage of learning when a response is first established.

• Extinction: The conditioned response decreases and eventually disappears when the CS is presented without the UCS.

• Spontaneous Recovery: The reappearance of a conditioned response after a pause.

• Renewal Effect: The conditioned response reappears when the organism is returned to the original environment.

Graphical Representation:

$\text{Strength of CR}$ vs. $\text{Time}$ shows acquisition, extinction, and spontaneous recovery phases.

Applications: Marketing

Classical conditioning principles are used in marketing to associate products with positive emotions or experiences.

• Example: Pairing a soft drink with images of happiness to elicit a positive response from consumers.

Little Albert Experiment

John B. Watson applied classical conditioning to study human emotions. In the "Little Albert" study, a child was conditioned to fear a white rat by pairing it with a loud noise.

• Stimulus Generalization: Albert began to fear other similar objects (e.g., dogs, Santa Claus mask).

• Stimulus Discrimination: Ability to distinguish between different stimuli (e.g., different alarm sounds).

Fetishes & Classical Conditioning

Sexual fixation on a nonsexual object can develop through accidental pairing of sexual arousal and a neutral stimulus.

• Example: Shoes become associated with sexual arousal after repeated pairings.

Conditioned Taste Aversion

Conditioned taste aversion develops after only one trial and can occur even with long delays between stimulus and response.

• Biological Preparedness: Organisms are primed to learn certain associations more easily (e.g., taste and illness).

• Example: Chemotherapy patients may develop aversions to foods eaten before treatment.

Operant Conditioning

Principles

Operant conditioning involves learning to associate a behaviour with its consequences. B.F. Skinner and Edward Thorndike were key figures in developing this theory.

• Law of Effect (Thorndike): Behaviours followed by rewards are more likely to occur; those followed by punishment are less likely.

• Positive: Adding a stimulus.

• Negative: Removing a stimulus.

• Reinforcement: Increases behaviour.

• Punishment: Decreases behaviour.

Reinforcement

• Positive Reinforcement: Adding something to increase the likelihood of a behaviour (e.g., praise, paychecks).

• Negative Reinforcement: Removing something to increase the likelihood of a behaviour (e.g., turning off a beeping sound when seatbelt is fastened).

Punishment

• Positive Punishment: Adding something to decrease the likelihood of a behaviour (e.g., scolding).

• Negative Punishment: Removing something to decrease the likelihood of a behaviour (e.g., confiscating a toy).

Effectiveness of Punishment

• Only tells what not to do.

• Can create anxiety, interfering with learning.

• May encourage subversive behaviour.

• Models aggressive behaviour for children.

Biological Influences on Learning

Limits and Predispositions

Biology places limits on what behaviours can be learned through reinforcement. Evolutionary predispositions make organisms more likely to fear certain things (e.g., snakes vs. cars).

• Instinctive Drift: Tendency for animals to revert to innate behaviours after repeated reinforcement.

Schedules of Reinforcement

Continuous vs. Partial Reinforcement

• Continuous Reinforcement: Behaviour is reinforced every time it occurs; leads to faster learning but also faster extinction.

• Partial Reinforcement: Behaviour is reinforced only occasionally; leads to slower extinction and better maintenance.

Partial Reinforcement Schedules

• Fixed Interval: Reinforcement delivered at predictable time intervals (e.g., medication at set times).

• Variable Interval: Reinforcement delivered at unpredictable time intervals (e.g., checking social media).

• Fixed Ratio: Reinforcement delivered after a predictable number of responses (e.g., factory workers paid per item).

• Variable Ratio: Reinforcement delivered after an unpredictable number of responses (e.g., gambling, tips).

Schedule	Interval	Ratio
Fixed	Fixed Interval	Fixed Ratio
Variable	Variable Interval	Variable Ratio

Graph: Variable ratio schedules produce the highest rates of responding and are most resistant to extinction.

Partial Reinforcement & IPV

Operant learning principles may contribute to decisions in abusive relationships, where intermittent reinforcement (e.g., occasional gifts after abuse) can make leaving more difficult.

Conditioning & Superstitious Behaviour

Superstitious Behaviour

Occurs when a behaviour is accidentally reinforced by coincidence. Skinner's pigeons repeated random behaviours, believing they caused food to appear.

• Humans: Rituals before exams or sports games.

• Takeaway: The brain is predisposed to find patterns, even when they are not real.

Cognitive Approaches to Learning

Latent Learning

Learning that occurs without immediate reinforcement and is demonstrated only when there is motivation to do so.

• Example: Tolman's rats developed cognitive maps of a maze without reinforcement, showing learning only when incentivized.

• Real-world examples: Navigating new places, cooking skills, social etiquette, driving routes, emergency responses.

Observational Learning

Learning by watching the behaviour of another person or model. Albert Bandura's research with Bobo dolls demonstrated that children can learn aggressive behaviours by observing others.

• Steps: (1) Paying attention, (2) Remembering, (3) Reproducing, (4) Motivation.

• Both positive and negative behaviours can be learned.

Violence in Television & Media

Effects of Media Violence

• Exposure to violent media can lower inhibitions to violence, distort understanding of social norms, and desensitize individuals to real-life violence.

• Violent video game players may engage in more aggression and delinquency, with lower academic achievement.

Transmission of Bias via Observing Others

Recent research shows that observing biased behaviour in others can lead to implicit attitude change, even without direct reinforcement.

• Observers adopt prejudiced reactions after watching a model, demonstrating the power of observational learning in social contexts.

Summary Table: Types of Learning

Type	Definition	Example
Habituation	Decreased response to repeated stimulus	Ignoring background noise
Sensitization	Increased response to repeated stimulus	Heightened anxiety after repeated criticism
Classical Conditioning	Associating involuntary response with stimulus	Pavlov's dogs salivating to bell
Operant Conditioning	Associating voluntary behaviour with consequence	Receiving praise for good grades
Latent Learning	Learning without immediate reinforcement	Knowing a route but using it only when needed
Observational Learning	Learning by watching others	Children imitating aggressive behaviour