Learning: Mechanisms, Principles, and Applications in Psychology

Learning in Psychology

Introduction to Learning

Learning is a foundational concept in psychology, referring to the process by which experience produces a relatively permanent change in behavior or knowledge. This chapter explores the mechanisms, types, and applications of learning, including classical and operant conditioning, cognitive approaches, and the influence of biology and media.

Unlearned Behaviours

Reflexes

• Definition: Automatic, involuntary responses to specific stimuli.

• Purpose: Reflexes are protective and essential for survival.

• Neural Basis: Involve primitive parts of the central nervous system (CNS), such as the brainstem.

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

Instincts

• Definition: Innate drives or tendencies that lead to particular patterns of behavior.

• Complexity: Instincts are more complex than reflexes and involve the movement of the organism as a whole (e.g., sexual activity, migration).

• Neural Basis: Involve higher brain centers.

What is Learning?

• Definition: A relatively permanent change in behavior or knowledge that results from experience.

• Processes: Involves acquiring skills or knowledge through experience, and can involve both conscious and unconscious processes.

Types of Non-Associative Learning

• Habituation: Decreased response to a repeated, non-threatening stimulus.

• Sensitization: Increased response to a repeated stimulus, often following a strong or noxious stimulus.

• Examples: Habituation—ignoring background noise; Sensitization—becoming more sensitive to a repeated annoying sound.

Associative Learning

Classical Conditioning

Classical conditioning is a 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 this form of learning.

• Unconditioned Response (UCR): An unlearned, natural response to an unconditioned stimulus (UCS), e.g., salivation to food.

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

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

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

• Conditioned Response (CR): Learned response to the conditioned stimulus, e.g., salivation to the bell.

Phases of Classical Conditioning

• Acquisition: The phase during which the CS and UCS are paired, leading to learning.

• 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.

Applications of Classical Conditioning

• Marketing: Pairing products (neutral stimuli) with positive emotions (UCS) to elicit a positive response (CR) toward the product.

• Little Albert Study: John B. Watson demonstrated that emotional responses could be conditioned in humans, showing that a child could be conditioned to fear a white rat by pairing it with a loud noise.

• Fetishes: Sexual fixation on a nonsexual object can develop through accidental pairing of sexual arousal (UCS) and a neutral stimulus (e.g., shoes).

• Conditioned Taste Aversion: Learning to avoid a food after a single pairing with illness, even with long delays between eating and illness. Demonstrates biological preparedness—some associations are learned more easily due to evolutionary factors.

Stimulus Generalization and Discrimination

• Stimulus Generalization: After conditioning, stimuli similar to the original CS elicit the same response (e.g., fear of all dogs after being bitten by one).

• Stimulus Discrimination: The ability to distinguish between different stimuli, so that only the specific CS elicits the conditioned response (e.g., recognizing different alarm sounds).

Operant Conditioning

Operant conditioning involves learning the association between a behavior and its consequences. B.F. Skinner and Edward Thorndike were key figures in developing this theory.

• Law of Effect (Thorndike): Behaviors followed by satisfying consequences are more likely to recur; those followed by unpleasant consequences are less likely.

Types of Consequences

• Reinforcement: Increases the likelihood of a behavior.

• Punishment: Decreases the likelihood of a behavior.

• Positive: Adding a stimulus.

• Negative: Removing a stimulus.

Examples

• Positive Reinforcement: Giving praise or rewards to increase behavior (e.g., high grades, paychecks).

• Negative Reinforcement: Removing an unpleasant stimulus to increase behavior (e.g., turning off a beeping seatbelt alarm).

• Positive Punishment: Adding an unpleasant stimulus to decrease behavior (e.g., scolding a student).

• Negative Punishment: Removing a pleasant stimulus to decrease behavior (e.g., taking away a toy).

Effectiveness and Drawbacks of Punishment

• Punishment only tells what not to do, not what to do.

• Can create anxiety, which interferes with learning.

• May encourage subversive behavior (e.g., sneaky behavior).

• Can model aggressive behavior for children.

Biological Influences on Learning

• Biology places limits on what behaviors can be learned through reinforcement.

• Evolutionary predispositions make some associations easier to learn (e.g., fear of snakes and spiders vs. cars and guns).

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

Schedules of Reinforcement

The pattern of reinforcement delivery affects the rate and strength of learning.

• Continuous Reinforcement: Reinforcing a behavior every time it occurs. Leads to faster learning but also faster extinction.

• Partial (Intermittent) Reinforcement: Reinforcing a behavior only some of the time. Leads to slower extinction and better maintenance of behavior.

Partial Reinforcement Schedules

Schedule	Description	Example
Fixed Interval	Reinforcement at predictable time intervals	Patients take pain relief medication at set times
Variable Interval	Reinforcement at unpredictable time intervals	Checking social media for updates
Fixed Ratio	Reinforcement after a predictable number of responses	Factory workers paid for every X items produced
Variable Ratio	Reinforcement after an unpredictable number of responses	Slot machines, gambling

Partial Reinforcement and Intimate Partner Violence (IPV)

• Intermittent reinforcement can contribute to stay-leave decisions in abusive relationships (e.g., occasional positive gestures after abuse).

Conditioning and Superstitious Behaviour

• Superstitious Behaviour: Occurs when a behavior is accidentally reinforced by coincidence.

• Skinner's Pigeons: Pigeons repeated random behaviors that were accidentally paired with food delivery.

• Humans also develop superstitions (e.g., lucky jerseys, rituals before exams).

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

Cognitive Approaches to Learning

Not all learning is explained by classical or operant conditioning. Cognitive processes, such as thinking and memory, play a significant role.

• 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, but only demonstrated their learning when incentivized.

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

Observational Learning

• Learning by watching the behavior of another person (model).

• Key processes: (1) Paying attention, (2) Remembering the behavior, (3) Reproducing the action, (4) Being motivated to carry it out.

• Both positive and negative behaviors can be learned (e.g., Bandura's Bobo doll experiment).

Violence in Television and Media

• Exposure to media violence is linked to increased aggression and delinquency in children and adolescents.

• By Grade 8, children may have witnessed over 8,000 murders and 800,000 violent acts on TV.

• Violent video game players show lower academic achievement and increased aggression (Anderson et al., 2004, 2009).

Transmission of Bias via Observing Others

• Observational learning can transmit social biases without direct reinforcement.

• Observers adopt prejudiced reactions after watching a model display bias, even if group members behave identically.

• Results in implicit attitude change.

Media Violence and Real-World Violence

• Lowers inhibitions to carry out violence.

• Distorts understanding—nonviolent acts may be seen as aggressive.

• Desensitizes individuals to real-life violence.

Additional info: This summary integrates and expands upon the provided lecture slides and notes, adding definitions, examples, and context for key concepts in learning as covered in a college-level psychology course.