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 that results from experience. It encompasses a variety of processes, both conscious and unconscious, through which organisms acquire new skills, knowledge, or behaviours.

• Learning: A relatively permanent change in behaviour or knowledge due to experience.

• Involves both conscious and unconscious processes.

• Types include habituation and sensitization.

Unlearned Behaviours

Reflexes and Instincts

Some behaviours are innate and do not require learning. These include reflexes and instincts, which are essential for survival and adaptation.

• Reflexes: Automatic, involuntary responses to specific stimuli.

  • Protective and essential for survival (e.g., withdrawal reflex, startle reflex).

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

  • Examples: Pupillary light reflex, scratch reflex.

• Instincts: Innate drives or tendencies that lead to complex patterns of behaviour.

  • More complex than reflexes.

  • Involve movement of the organism as a whole (e.g., migration, sexual activity).

  • Involve higher brain centers.

Types of Learning

Habituation

Habituation is a simple form of learning in which an organism decreases or ceases its responses to a repetitive, harmless stimulus.

• Allows organisms to ignore irrelevant stimuli and focus on important changes in the environment.

• Example: A person stops noticing the sound of a ticking clock after a while.

Sensitization

Sensitization is the increased responsiveness to a repeated stimulus, often one that is intense or noxious.

• Organism becomes more sensitive to a stimulus over time.

• Example: Becoming increasingly annoyed by a dripping faucet.

Classical and Operant Conditioning

Classical Conditioning

Classical conditioning is a learning process in which an organism learns to associate two stimuli, resulting in a change in behaviour.

• Discovered by Ivan Pavlov through research on the digestive system of dogs.

• Organisms have two types of responses to the environment:

  • Unconditioned (unlearned)

  • Conditioned (learned)

Key Components:

• Neutral Stimulus (NS): Does not elicit a response initially.

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

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

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

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

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 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 with positive stimuli to elicit positive emotional responses.

• Little Albert Study: John B. Watson demonstrated that emotional responses (fear) could be conditioned in humans.

• Fetishes: Sexual fixation on nonsexual objects can develop through accidental pairing of arousal and neutral stimuli.

• Conditioned Taste Aversion: Learning to avoid a food after a single negative experience (e.g., nausea), even with long delays between the stimulus and response.

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

Principles of Operant Conditioning

Operant conditioning is a type of learning in which behaviour is influenced by its consequences. Organisms learn to associate a behaviour with a consequence (reinforcement or punishment).

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

• Positive: Adding something.

• Negative: Taking something away.

• Reinforcement: Increases behaviour.

• Punishment: Decreases behaviour.

Types of Reinforcement and Punishment

• Positive Reinforcement: Adding a desirable stimulus to increase behaviour (e.g., praise, paychecks).

• Negative Reinforcement: Removing an aversive stimulus to increase behaviour (e.g., turning off a loud alarm).

• Positive Punishment: Adding an aversive stimulus to decrease behaviour (e.g., scolding).

• Negative Punishment: Removing a desirable stimulus to decrease behaviour (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, interfere with learning, and encourage subversive behaviour.

• May model aggressive behaviour for children.

Biological Influences on Learning

Biological factors set limits on what and how organisms can learn.

• Evolutionary predispositions: 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 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 some of the time; leads to slower extinction and better maintenance.

Partial Reinforcement Schedules

Schedule	Description	Example
Fixed Interval	Reinforcement at predictable time intervals	Taking medication at set times
Variable Interval	Reinforcement at unpredictable time intervals	Checking social media
Fixed Ratio	Reinforcement after a predictable number of responses	Factory workers paid per item
Variable Ratio	Reinforcement after an unpredictable number of responses	Slot machines, getting a big tip

Partial Reinforcement and Intimate Partner Violence (IPV)

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

Conditioning and Superstitious Behaviour

Superstitious behaviour arises when a behaviour is accidentally reinforced by coincidence.

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

• 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

Latent Learning

Latent learning 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

Observational learning involves acquiring new behaviours by watching others (models).

• Key processes: Attention, retention, reproduction, motivation.

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

Learning and Media

Transmission of Bias via Observing Others

• Observing others' biased behaviour can lead to implicit attitude change, even without direct reinforcement.

• Recent research (2024): Observers adopted prejudiced reactions after watching models display bias.

Media Violence and Real-World Violence

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

• Violent video games are associated with increased aggression and lower academic achievement.