- A child is bitten by a large, brown dog and develops a phobia of that specific dog. Through stimulus generalization, the child also becomes fearful of other large dogs. Which of the following correctly identifies the conditioned response (CR) and the unconditioned stimulus (US) in the original learning event?
Answer: CR: fear of the specific brown dog; US: the bite.
The unconditioned stimulus (US) is the event that causes a natural reflex: the dog bite. The unconditioned response (UR) is the pain and fear caused by the bite. The specific brown dog is the neutral stimulus that becomes the conditioned stimulus (CS). The learned fear of that specific brown dog is the conditioned response (CR). The fear of other large dogs is a generalized conditioned response, not the original CR. Pain is the UR, not the US.
- In an advertisement, a new brand of soft drink is consistently shown being enjoyed by a group of attractive, happy people at a fun beach party. The goal is that consumers will develop a positive feeling toward the soft drink. In this application of evaluative conditioning, the positive emotional response elicited by the attractive people and fun setting functions as the:
Answer: unconditioned response.
The attractive, happy people and fun setting are the unconditioned stimulus (US) because they naturally evoke a positive emotional response. That positive feeling is the unconditioned response (UR). The soft drink is the neutral stimulus that, through pairing with the US, becomes the conditioned stimulus (CS). The goal is for the soft drink alone to eventually elicit a positive feeling, which would be the conditioned response (CR). The question asks about the response to the people/setting, which is the UR.
- A cat hears the electric can opener (a neutral stimulus) and then is immediately given its favorite wet food, which causes it to salivate. This pairing is repeated daily. Soon, the cat salivates as soon as it hears the sound of the can opener. The salivation in response to the food is the ____, and the salivation in response to the can opener is the ____.
Answer: unconditioned response; conditioned response
The food is the unconditioned stimulus (US) that naturally causes the unconditioned response (UR) of salivation. The can opener is the neutral stimulus that becomes the conditioned stimulus (CS). The learned response of salivating to the can opener alone is the conditioned response (CR). The key distinction is the trigger for the response: food (US) triggers the UR, while the can opener (CS) triggers the CR.
- Based on the passage, which of the following correctly identifies a component of the classical conditioning that has occurred?
Answer: The unconditioned response is the nausea caused by the drug.
The chemotherapy drug is the unconditioned stimulus (US) because it naturally causes nausea. The nausea that results from the drug is the unconditioned response (UR). The hospital room and its smell are the neutral stimuli that become conditioned stimuli (CS) through association. The nausea elicited by the hospital/smell alone is the conditioned response (CR). Therefore, the nausea caused by the drug itself is the UR.
- A dog is conditioned to salivate (CR) at the sound of a bell (CS) that was previously paired with food (US). The trainer then begins a new phase of conditioning: a flashing light is presented, followed immediately by the bell, but no food is given. After several trials, the dog begins to salivate at the sight of the flashing light alone. In this second phase of conditioning, the bell serves as the:
Answer: unconditioned stimulus.
This is an example of second-order or higher-order conditioning. In the first phase, the bell becomes a conditioned stimulus (CS). In the second phase, this established CS (the bell) is used to condition a new stimulus (the light). For the purpose of conditioning the light, the bell functions in a similar role to the original unconditioned stimulus (food), as it is the stimulus that elicits the response without further pairing. Thus, in the context of the second phase, the bell acts as the unconditioned stimulus.
- A young child visiting a clinic for the first time receives a painful vaccination from a nurse wearing a blue uniform. The pain from the injection is distressing and makes the child cry. During subsequent visits, the child begins to cry and show signs of distress at the mere sight of any person in a blue uniform. In this scenario, the child's crying in response to the painful injection is the:
Answer: unconditioned response (UR).
The painful injection is the unconditioned stimulus (US) because it naturally elicits a response without prior learning. The crying and distress that result directly from this pain is the unconditioned response (UR). The blue uniform, initially a neutral stimulus, becomes the conditioned stimulus (CS) after being paired with the US. The crying at the sight of the uniform alone is the conditioned response (CR). The question specifically asks for the response to the injection, which is the UR.
- An individual experiences their first panic attack (a sudden, intense physiological arousal) while shopping in a crowded mall. The panic attack seems to happen for no reason. Subsequently, the individual begins to feel high anxiety and a sense of dread whenever they enter a crowded public space. In this instance of conditioning, the initial panic attack itself serves as the:
Answer: unconditioned stimulus (US).
This question tests your understanding of classical conditioning, specifically how to identify the different components when a phobia develops after a traumatic experience. When analyzing conditioning scenarios, you need to determine what naturally triggers a response versus what becomes associated through learning.
The initial panic attack serves as the unconditioned stimulus (US) because it naturally and automatically produces fear and anxiety without any prior learning. Just like how a loud noise naturally startles you or how food naturally makes you salivate, a panic attack inherently creates distress and fear responses in the body. This makes D correct.
Let's examine why the other options are incorrect. A is wrong because the panic attack cannot be a conditioned stimulus (CS) - the CS is something that gains meaning through association, but the panic attack was the original traumatic event that started the conditioning process. B is incorrect because the panic attack isn't a conditioned response (CR) - it was the initial event, not a learned response. The ongoing anxiety in crowded spaces would be the CR. C is wrong because the panic attack wasn't neutral - it had a powerful, immediate effect on the person's emotional state.
Remember this pattern: in classical conditioning scenarios involving phobias or trauma, the original traumatic event (panic attack, car accident, dog bite) is typically the US because it naturally produces fear. The location or context where it happened becomes the CS, and the learned fear response becomes the CR.
- To create a taste aversion in wolves, researchers bait a sheep carcass with a chemical that induces temporary, but severe, gastric distress. A wolf that consumes the bait becomes ill. Later, the wolf avoids hunting live sheep, showing signs of nausea when it smells them. Which element in this scenario is the unconditioned stimulus (US)?
Answer: The chemical in the bait.
The unconditioned stimulus (US) is the event or object that automatically triggers a physiological response without any prior learning. In this case, the chemical is what causes the illness. The sheep (or its scent/taste) is the neutral stimulus that becomes the conditioned stimulus. The illness itself is the unconditioned response (UR). The avoidance is a conditioned response (CR).
- In a famous experiment, a tone (neutral stimulus) was paired with a puff of air to the eye (unconditioned stimulus), which caused an eye-blink (unconditioned response). After several pairings, the tone alone could elicit an eye-blink (conditioned response). A second group of participants was exposed to the tone and the air puff randomly, with no reliable pairing. This second group failed to develop a conditioned eye-blink to the tone. This finding best supports which cognitive perspective on classical conditioning?
Answer: The organism learns the predictive or informational value of the conditioned stimulus.
This scenario illustrates the Rescorla-Wagner model, which emphasizes the cognitive element of conditioning. Conditioning occurs not just because two stimuli are paired (contiguity), but because the conditioned stimulus comes to reliably predict the unconditioned stimulus (contingency). The failure of conditioning in the random-pairing group shows that the tone must provide information about the upcoming air puff for an association to be learned.
- A soldier experiences a traumatic event (US) in a desert environment, leading to a strong fear response (UR). The sight of sand (originally NS) becomes associated with this trauma. Later, back home, the sight of sand at a playground (CS) elicits anxiety (CR). If the soldier then repeatedly visits the playground without any traumatic events occurring, the anxiety response will likely diminish. This process of weakening the CR is called:
Answer: extinction.
Extinction is the gradual weakening and disappearance of a conditioned response. It occurs when the conditioned stimulus (the sight of sand) is repeatedly presented without the unconditioned stimulus (the traumatic event). Over time, the association is unlearned, and the CR (anxiety) diminishes.
- A researcher is conditioning a dog to salivate to a specific musical tone. During the acquisition phase, the researcher plays the tone and then immediately presents food to the dog. After several trials, the dog salivates to the tone alone. If the researcher were to then present the food before playing the tone, this procedure is known as backward conditioning and is generally ineffective. This is because the tone no longer functions as a reliable:
Answer: predictor of the unconditioned stimulus, thus failing to become a conditioned stimulus.
In classical conditioning, the neutral stimulus (the tone) must reliably predict the arrival of the unconditioned stimulus (the food) for it to become a conditioned stimulus. In backward conditioning, the US is presented before the NS. Because the tone no longer signals that food is coming, it loses its predictive value and fails to become an effective conditioned stimulus.
- A person develops a fear of flying after experiencing severe turbulence on a flight. Later, they undergo therapy where they are exposed to flight-related cues (like the sound of a jet engine) in a safe environment without any turbulence. Gradually, their fear diminishes. However, months later, while watching a movie with a loud jet sound, they feel a sudden jolt of anxiety. This reappearance of the fear response is known as spontaneous recovery. The anxiety felt while watching the movie is best identified as a:
Answer: recovered conditioned response (CR).
The original fear of flying was a conditioned response (CR) to flying-related cues (CS) that were associated with turbulence (US). The therapy led to extinction of this CR. Spontaneous recovery is the re-emergence of a previously extinguished conditioned response after a rest period. Therefore, the anxiety felt during the movie is the recovered conditioned response.
- A lab rat is placed in a chamber. A high-frequency tone is sounded, followed by a mild electric shock to the rat's feet, causing it to jump. After several pairings, the rat jumps when it hears the high-frequency tone. The researcher then begins to present a low-frequency tone, which is never followed by a shock. Initially, the rat jumps to the low-frequency tone, but with continued trials, it ceases to jump to the low tone while still jumping to the high tone. The rat's final behavior of jumping only to the high-frequency tone demonstrates:
Answer: stimulus discrimination, where the low tone is differentiated from the conditioned stimulus.
Stimulus discrimination is the learned ability to distinguish between a conditioned stimulus and other, similar stimuli that do not signal an unconditioned stimulus. The rat learns that only the high-frequency tone (the CS) predicts the shock (the US), and not the low-frequency tone. Therefore, it stops responding to the low tone, demonstrating discrimination.
- In this counter-conditioning procedure, the state of relaxation functions as a response that is intended to replace the fear. What is the unconditioned stimulus (US) that produces this relaxation response?
Answer: The deep muscle relaxation technique.
When you encounter questions about systematic desensitization, remember this is a behavioral therapy technique based on classical conditioning principles. The key is identifying which stimulus naturally produces the relaxation response without prior learning.
In systematic desensitization, the therapist pairs anxiety-provoking stimuli with relaxation to replace fear responses. The deep muscle relaxation technique (D) serves as the unconditioned stimulus because it directly and naturally triggers the body's relaxation response through physical processes - muscle tension release, slower breathing, and activation of the parasympathetic nervous system. No prior learning or conditioning is required for this technique to produce relaxation.
Let's examine why the other options don't work: The imagined spider (A) actually functions as the conditioned stimulus in this procedure - it's the stimulus being paired with relaxation to reduce the fear response. The therapist's instructions (B) are simply the delivery method for implementing the technique, not the stimulus that directly produces relaxation. The client's pre-existing fear of spiders (C) is the problematic response being treated, not something that produces relaxation.
The distinction here is crucial: an unconditioned stimulus produces a natural, unlearned response. Physical relaxation techniques directly trigger physiological changes in the body, making them unconditioned stimuli for the relaxation response.
When studying behavioral therapies, focus on identifying what naturally produces responses versus what has been learned through conditioning. This will help you distinguish between unconditioned and conditioned stimuli in therapeutic contexts.
- A pigeon is conditioned in a Skinner box where a red light is reliably followed by the presentation of food. The pigeon learns to peck a key in anticipation of the food. Later, a compound stimulus of the red light and a new auditory tone are presented together, followed by food. When tested with the tone alone, the pigeon shows very little response. The failure of the tone to become a conditioned stimulus is an example of:
Answer: blocking.
Blocking occurs when a previously established conditioned stimulus (the red light) prevents a new stimulus (the tone) from becoming a conditioned stimulus when they are presented together. Because the red light already fully predicts the food, the tone provides no new information and is therefore not learned about, or 'blocked'.
- In classical conditioning, the time interval between the presentation of the conditioned stimulus and the unconditioned stimulus is a critical factor. In which arrangement is conditioning typically LEAST effective?
Answer: Backward conditioning, where the US is presented before the CS begins.
Backward conditioning (US before CS) is generally the least effective method for establishing a conditioned response. This is because the CS does not predict the occurrence of the US; in fact, it predicts the absence of the US since the US has already happened. For conditioning to be effective, the CS must have predictive value.
- A child is stung by a jellyfish at a particular beach with white sand, leading to a fear of that location. If the child later shows a fear response when visiting a different beach that also has white sand, it is an example of ____. If the child develops a fear of the word "ocean" after hearing their parents say it with a fearful tone right before visiting the beach, it is an example of ____.
Answer: stimulus generalization; second-order conditioning
The first scenario is stimulus generalization, where a response conditioned to one stimulus (the original beach) is elicited by similar stimuli (other white sand beaches). The second scenario is second-order conditioning. The beach is the first CS. The word "ocean" becomes a new CS because it is paired with the first CS (the beach visit), not with the original US (the sting).
- A researcher first repeatedly exposes a laboratory animal to a flashing light. The light is presented alone and is not paired with any other stimulus. In a second phase, the researcher attempts to condition the animal by pairing the same flashing light with a mild electric shock. The researcher finds that conditioning is significantly slower and weaker compared to a control group that had no prior exposure to the light. This phenomenon is known as:
Answer: latent inhibition.
Latent inhibition, also known as the pre-exposure effect, occurs when prior exposure to a neutral stimulus in the absence of an unconditioned stimulus makes it more difficult for that stimulus to become a conditioned stimulus later. Because the animal learned that the light was irrelevant, it is harder to subsequently associate it with the shock.
