Learning: Mechanisms, Principles, and Applications in Psychology

Learning in Psychology

Introduction to Learning

Learning is a foundational concept in psychology, referring to a relatively permanent change in behaviour or knowledge resulting from experience. It encompasses a variety of processes, from simple habituation to complex cognitive learning, and involves both conscious and unconscious mechanisms.

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 behaviour.

• 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 behaviour or knowledge that results from experience.

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

• Types of Learning:

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

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

Classical and Operant Conditioning

Classical Conditioning

Classical conditioning is a process by which organisms learn to associate stimuli and consequently 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.

• Conditioned Response (CR): A learned response to a previously neutral stimulus (now the conditioned stimulus, CS) after association with the UCS.

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

Components of Classical Conditioning

• Neutral Stimulus (NS): A stimulus that initially does not elicit a specific response.

• Unconditioned Stimulus (UCS): Naturally triggers a response.

• Unconditioned Response (UCR): The natural, automatic reaction to the UCS.

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

• Conditioned Response (CR): The learned response to the CS.

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) to the product.

• Little Albert Study: John B. Watson demonstrated that human emotions could be conditioned. Little Albert was 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.

Stimulus Generalization and Discrimination

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

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

Operant Conditioning

Operant conditioning involves learning to associate a behaviour with its consequences (reinforcement or punishment). 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 recur; those followed by punishment are less likely.

Reinforcement and Punishment

• Reinforcement: Increases the likelihood of a behaviour.

  • Positive Reinforcement: Adding something desirable (e.g., praise, paychecks).

  • Negative Reinforcement: Removing something aversive (e.g., turning off a beeping seatbelt alarm).

• Punishment: Decreases the likelihood of a behaviour.

  • Positive Punishment: Adding something aversive (e.g., scolding a student).

  • Negative Punishment: Removing something desirable (e.g., taking away a toy).

Effectiveness of Punishment

• Only tells what not to do, not what to do.

• Can create anxiety, interfering with learning.

• May encourage subversive behaviour (sneakiness).

• Can model aggressive behaviour for children.

Biological Influences on Learning

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

• Evolutionary predispositions make us more likely to fear certain things (e.g., snakes, spiders) than others (e.g., cars, guns).

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

Schedules of Reinforcement

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

• Partial Reinforcement: Behaviour is reinforced only some of the time. Leads to slower extinction and better maintenance.

Partial Reinforcement Schedules

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

Partial Reinforcement & Intimate Partner Violence (IPV)

• Operant learning principles may contribute to decisions to stay or leave abusive relationships.

• Intermittent reinforcement (e.g., occasional positive gestures after abuse) can make leaving more difficult.

Conditioning and Superstitious Behaviour

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

• Skinner's Pigeons: Pigeons repeated random behaviours that were accidentally reinforced with food.

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

• Takeaway: Our brains are predisposed to find patterns, even when none exist.

Cognitive Approaches to Learning

• Not all learning is explained by classical or operant conditioning.

• Unseen mental processes (cognition) play a role in learning.

• Includes latent learning and observational 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, 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 behaviour of another person (model).

• Key processes: paying attention, remembering, reproducing the action, and being motivated to carry it out.

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

Transmission of Bias via Observing Others

• Observers can acquire biases simply by watching others interact with social groups, even without direct reinforcement.

• Implicit attitude change can occur through observation alone.

Violence in Media and Real-World Behaviour

• Exposure to media violence is linked to increased aggression and desensitization to real-life violence.

• By Grade 8, children may have witnessed thousands of violent acts on TV.

• Violent video game play is associated with increased aggression and lower academic achievement.

• Media violence can lower inhibitions, distort understanding of violence, and desensitize viewers.

Additional info: This summary integrates and expands upon the provided lecture slides and notes, ensuring coverage of all major learning theories and their applications in psychology.