Classical Conditioning (Chapter 6)

What is classical conditioning?

Classical conditioning is learning through association. A previously neutral stimulus becomes associated with another stimulus and eventually triggers a learned response.

• Example: A child gets bitten by a dog and later feels afraid when seeing dogs.

Who was Ivan Pavlov, and what did he study?

Ivan Pavlov was a physiologist who studied how dogs learned to associate a sound with food. After repeatedly pairing a bell with food, dogs began salivating at the sound of the bell alone.

What is an unconditioned stimulus (UCS)?

A stimulus that naturally and automatically triggers a response without prior learning.

Example: Food naturally causes a dog to salivate.

What is an unconditioned response (UCR)?

A natural, unlearned response to an unconditioned stimulus.

Example: A dog salivates when it smells food.

What is a conditioned stimulus (CS)?

A previously neutral stimulus that, after being associated with a UCS, triggers a learned response.

Example: A bell that has been repeatedly paired with food.

What is a conditioned response (CR)?

A learned response to a conditioned stimulus.

Example: A dog salivates when it hears the bell, even when food is absent.

What is the difference between the UCS and the CS?

The UCS naturally triggers a response; the CS triggers a learned response after being associated with the UCS. Example: Food is the UCS, while the bell becomes the CS.

What is the difference between the UCR and the CR?

The UCR is a natural, unlearned response; the CR is a learned response to the CS. Example: Salivating to food is the UCR, while salivating to the bell is the CR.

In Pavlov’s experiment, identify the UCS, UCR, CS, and CR.

UCS: Food. UCR: Salivation in response to food. CS: Bell after being paired with food. CR: Salivation in response to the bell.

What happens during the acquisition stage of Pavlov’s experiment?

The dog learns the association between the bell and the food as the bell is paired with food. Eventually, the bell alone triggers salivation.

A child initially feels neutral about the dentist but repeatedly receives a fun toy during dental visits. What are the CS, UCS, and CR?

CS: The dentist’s office. UCS: The fun toy, assuming it naturally creates excitement. CR: The child’s learned positive or excited feelings about the dentist’s office.

An advertisement repeatedly pairs toothpaste with an appealing celebrity. How might classical conditioning explain the advertisement’s effect?

The celebrity or appealing image may act as a UCS that naturally creates positive feelings. The toothpaste, initially neutral, becomes a CS. The positive feelings associated with the toothpaste become the CR. This is the intended association the advertisement tries to create.

Who was John Watson, and what did he investigate?

John Watson was a psychologist who studied how emotional responses, including fear, could be learned through conditioning.

What was the Little Albert experiment?

Watson and Rosalie Rayner presented an infant named Albert with a white rat and paired it with a frightening loud noise. Albert later showed fear when presented with the rat alone, demonstrating that fear could be conditioned.

In the Little Albert experiment, identify the UCS, UCR, CS, and CR.

UCS: The loud noise. UCR: Albert’s natural fear or startle response to the noise. CS: The white rat after being paired with the noise. CR: Albert’s learned fear response to the rat.

A child sees their brother get bitten by a dog and later feels afraid around dogs. If explaining this through classical conditioning, what are the CS, UCS, UCR, and CR?

CS: Dogs associated with the frightening event. UCS: The painful or frightening bite-related event. UCR: The natural fear or pain response to that event. CR: The learned fear response to dogs. Note: Simply watching someone get bitten can also involve observational learning.

Who was John Garcia, and what did his research demonstrate?

John Garcia studied taste aversion and showed that animals can learn to associate a taste with illness. This association can form after just one experience, even when the illness occurs after a delay.

In Garcia’s taste-aversion research, identify the CS, UCS, UCR, and CR.

CS: The flavored water. UCS: The radiation or illness-inducing treatment. UCR: The natural sickness response caused by the treatment. CR: The learned nausea or avoidance of the flavored water.

Why is Garcia’s taste-aversion research important?

It showed that learning can occur after a single pairing and that an animal can associate a taste with illness even when the illness does not happen immediately. Biological predispositions can influence what associations are learned.

What is acquisition in classical conditioning?

Acquisition is the process of learning the association between the CS and UCS. Example: A person begins associating a bridge with a frightening experience that occurred there.

A person repeatedly hears a particular song while enjoying time with someone they love. Later, the song brings back warm feelings. What process explains the learning of this association?

Acquisition. The person learns to associate the song with the positive experience.

What is discrimination in classical conditioning?

Discrimination is learning to distinguish the conditioned stimulus from similar stimuli that do not trigger the same response. Example: A person fears a particular white rat but is not afraid of a white stuffed animal.

A dog fears one specific sound that has been paired with a frightening event but does not react to other similar sounds. What process is this?

Discrimination. The dog has learned to distinguish the specific conditioned stimulus from similar sounds.

What is generalization in classical conditioning?

Generalization occurs when stimuli similar to the conditioned stimulus also trigger the conditioned response. Example: After being bitten by one dog, a person becomes afraid of other dogs.

A child is bitten by one dog and later feels afraid of all dogs, including friendly dogs they have never met. What process is this?

Generalization. The learned fear spreads from the original dog to similar stimuli.

What is the difference between discrimination and generalization?

Discrimination means responding to a specific stimulus but not similar ones. Generalization means responding to similar stimuli as well. Example: Fearing only the dog that bit you is discrimination; fearing most dogs afterward is generalization.

What is extinction in classical conditioning?

Extinction occurs when the conditioned response gradually weakens because the CS is repeatedly presented without the UCS. Example: A person’s fear of a dog may decrease after repeated safe encounters.

A dog has learned to salivate to a bell. The bell is repeatedly rung without food, and the dog gradually stops salivating. What process is this?

Extinction. The conditioned response weakens because the conditioned stimulus is no longer followed by the unconditioned stimulus.

Does extinction necessarily mean the learned association is permanently erased?

No. The conditioned response may weaken, but it can reappear later. This is why spontaneous recovery can occur.

What is spontaneous recovery?

Spontaneous recovery is the reappearance of an extinguished conditioned response after a period of time. Example: A dog that stopped salivating to a bell after extinction begins salivating to it again after a rest period.

A dog’s salivation response to a bell decreases during extinction. After a break, the dog salivates when the bell rings again. What process is this?

Spontaneous recovery. The previously weakened conditioned response has returned after a period of time.

What is the difference between extinction and spontaneous recovery?

Extinction is when the conditioned response weakens after the CS is repeatedly presented without the UCS. Spontaneous recovery is when that response reappears after a period of time.

A child feels sick after eating a particular food and later feels nauseated at the smell of that food. Which type of conditioning may explain this, and why?

Classical conditioning. The food’s taste or smell becomes associated with illness, so the food-related stimulus later triggers a learned nausea response.

A student feels anxious when entering a classroom where they previously experienced a frightening event. Identify the likely CS and CR.

CS: The classroom, after being associated with the frightening event. CR: The student’s learned anxiety upon entering the classroom.

A person no longer reacts fearfully to a stimulus after repeatedly experiencing it without the frightening event. Later, the fear returns briefly. Identify both processes in order.

Extinction followed by spontaneous recovery.

What is the key difference between classical conditioning and observational learning?

Classical conditioning involves learning an association between stimuli. Observational learning involves learning by watching another person’s behavior and its consequences.

A child watches another child get bitten by a dog and copies that child’s fearful reaction without personally being bitten. Is observational learning also a possible explanation?

Yes. The child may learn by observing someone else’s reaction. Classical conditioning is a stronger explanation when the child personally develops an association between a stimulus and a naturally fear-inducing event.

Essay Question: How would you use classical conditioning to teach a child to feel happy when hearing a particular song? Identify the CS, UCS, UCR, and CR.

Repeatedly play the song while giving the child something that naturally creates happiness, such as a favorite toy. UCS: The favorite toy. UCR: Natural happiness or excitement in response to the toy. CS: The song after repeated pairings. CR: The child’s learned happiness or excitement when hearing the song alone.

Essay Question: What four labels should you always identify when answering a classical-conditioning essay question?

UCS (unconditioned stimulus), UCR (unconditioned response), CS (conditioned stimulus), and CR (conditioned response). Define each label in the specific scenario, rather than just listing the abbreviations.

Essay Question: A child becomes afraid of a dog after being bitten. Explain how classical conditioning could account for the fear.

A painful or frightening bite naturally produces fear or pain (UCR). The bite-related event is the UCS. The dog becomes associated with that event and acts as the CS. The child’s learned fear of the dog is the CR. If the fear spreads to other dogs, that is generalization.

Essay Question: What is a common mistake to avoid when identifying the four parts of classical conditioning?

Do not confuse the stimulus with the response. A UCS is the thing that naturally triggers a reaction; a UCR is the natural reaction. A CS is the learned trigger; a CR is the learned reaction. For example, the loud noise is the UCS, while the startle response is the UCR.