Classical Conditioning and Behaviourism: Study Notes for Introductory Psychology

Learning in Psychology

Introduction to Learning

Learning is a central concept in psychology, referring to the process by which experience leads to relatively permanent changes in behavior. This section introduces the foundational ideas and types of learning relevant to classical conditioning.

• Definition of Learning: A relatively permanent change in behavior as a result of experience or practice. Changes due to growth or maturation are not considered learning.

• Three General Kinds of Learning:

  • Classical Conditioning

  • Operant Conditioning

  • Observational Learning

• Reflective Questions: Students are encouraged to reflect on their own learning experiences, considering what has helped or hindered their learning and how their learning strategies have evolved.

Behaviourism and Classical Conditioning

Foundations of Behaviourism

Behaviourism is a school of psychology that focuses on observable and measurable aspects of behavior. It emphasizes the role of environmental stimuli in shaping behavior, rejecting introspection and the study of mental processes.

• Key Principle: Psychology should study only observable behavior, not internal mental states.

• Stimulus: Any event or situation that evokes a response from an organism.

• Response: The observable reaction of an organism to a stimulus.

Classical Conditioning

Classical conditioning is a type of learning in which an organism learns to associate two or more stimuli, resulting in a change in behavior. This form of learning is involuntary and often involves emotional or physiological responses.

• Definition: Learning that occurs through the repeated association of two or more different stimuli.

• Key Process: A previously neutral stimulus becomes capable of eliciting a response after being paired with a stimulus that naturally produces that response.

• Example: Pavlov's dogs learned to salivate (response) to the sound of a bell (neutral stimulus) after it was repeatedly paired with food (unconditioned stimulus).

Major Theorists in Classical Conditioning

Timeline of Key Researchers

The following table summarizes the main theorists associated with classical conditioning and their periods of research.

Theorist	Timeline for Research Conducted
Pavlov (1849-1936)	1890’s – 1900’s
Watson (1874-1949)	1900’s – 1930’s
Rayner (1898-1958)	1910’s – 1920
Rescorla (1904-1990)	1930’s – 1960’s

Pavlov and the Discovery of Classical Conditioning

Pavlov's Experiments

Ivan Pavlov, a Russian physiologist, is credited with the discovery of classical conditioning. His research focused on the digestive system of dogs, particularly the role of salivary reflexes.

• Apparatus: Pavlov used a device to measure the amount of saliva produced by dogs in response to various stimuli.

• Observation: Dogs would salivate not only when food was presented but also in response to stimuli associated with food, such as the sight of the food dish or the sound of footsteps.

• Significance: This led to the identification of the process by which a neutral stimulus (e.g., a bell) could elicit a salivation response after being paired with food.

Key Terms in Classical Conditioning

• Unconditioned Stimulus (UCS): A stimulus that naturally and automatically triggers a response without prior learning (e.g., food).

• Unconditioned Response (UCR): The unlearned, naturally occurring response to the UCS (e.g., salivation to food).

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

• Conditioned Stimulus (CS): A previously neutral stimulus that, after association with the UCS, comes to trigger a conditioned response (e.g., bell after conditioning).

• Conditioned Response (CR): The learned response to the previously neutral stimulus (e.g., salivation to bell).

Stages of Classical Conditioning

• Before Conditioning: UCS (food) → UCR (salivation); NS (bell) → no response

• During Conditioning: NS (bell) + UCS (food) → UCR (salivation)

• After Conditioning: CS (bell) → CR (salivation)

Principles and Phenomena in Classical Conditioning

Stimulus Generalization and Discrimination

• Stimulus Generalization: The tendency for stimuli similar to the conditioned stimulus to elicit similar responses. For example, a dog conditioned to salivate to a bell may also salivate to other similar sounds.

• Stimulus Discrimination: The learned ability to distinguish between a conditioned stimulus and other stimuli that do not signal an unconditioned stimulus.

Extinction and Spontaneous Recovery

• Extinction: The gradual weakening and disappearance of a conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.

• Spontaneous Recovery: The reappearance of an extinguished conditioned response after a rest period.

• Example: Pavlov’s dogs eventually stopped salivating to the bell when it was presented without food, but the response could reappear after some time.

Applications and Value of Classical Conditioning

Adaptive Value and Biological Preparedness

• Adaptive Value: Classical conditioning helps organisms adapt to their environment by learning to predict and prepare for significant events.

• Biological Preparedness: Some associations are learned more easily due to genetic predispositions (e.g., fear of snakes or taste aversions).

• Taste Aversion: Associating a particular taste with illness, leading to avoidance of that taste in the future. This can occur after just one pairing and last for a long time.

Classical Conditioning in Everyday Life

• Phobias: Many phobias are thought to result from classical conditioning, where a neutral stimulus becomes associated with a frightening event.

• Drug Use: Environmental cues associated with drug use can trigger cravings and contribute to tolerance and overdose risk.

• Advertising: Products are paired with positive stimuli (e.g., celebrities) to elicit favorable responses from consumers.

Therapeutic Applications

• Systematic Desensitization: A procedure based on classical conditioning in which a person imagines or is exposed to anxiety-provoking stimuli while practicing relaxation techniques. This form of counterconditioning replaces fear and anxiety with relaxation and is effective for treating phobias and fears.

Summary Table: Key Terms in Classical Conditioning

Term	Definition	Example
Unconditioned Stimulus (UCS)	Stimulus that naturally elicits a response	Food
Unconditioned Response (UCR)	Natural, unlearned reaction to UCS	Salivation to food
Neutral Stimulus (NS)	Stimulus that does not elicit the response before conditioning	Bell (before pairing)
Conditioned Stimulus (CS)	Previously neutral stimulus that elicits response after conditioning	Bell (after pairing with food)
Conditioned Response (CR)	Learned response to the CS	Salivation to bell

Key Equations and Concepts

• Classical Conditioning Formula:

$\text{NS} + \text{UCS} \rightarrow \text{UCR}$ $\text{CS} \rightarrow \text{CR}$

• Example: Bell (NS) + Food (UCS) → Salivation (UCR); Bell (CS) → Salivation (CR)

Additional info: These notes expand on the original slides by providing definitions, examples, and context for key terms and processes in classical conditioning, as well as applications and therapeutic uses.