# Classical Conditioning

Psychology I · Learning and Emotion · https://tryals.app/learn/psychology-i/classical-conditioning

## The Life Cycle of a Learned Association

Classical conditioning is not just a single moment of learning; it has a dynamic life cycle that governs how associations form, fade, and spread.

**Acquisition** is the initial learning phase where a neutral stimulus is paired with an unconditioned stimulus. This pairing works best when the neutral stimulus is presented shortly **before** the unconditioned stimulus so it acts as a reliable predictive cue.

If the conditioned stimulus is later presented repeatedly without the unconditioned stimulus, **extinction** occurs as the conditioned response gradually weakens. However, extinction is suppression, not erasure.

After a rest period, the extinguished response can temporarily reappear, a phenomenon known as **spontaneous recovery**, proving the underlying association survived.

## Spreading and Chaining Responses

Two opposing processes determine how broadly a conditioned response applies to related environmental cues:

| Process | What happens | Clinical / Real-world Example |
| --- | --- | --- |
| **Generalization** | Responding to stimuli similar to the original CS | Little Albert fearing white rabbits and fuzzy coats |
| **Discrimination** | Learning to respond ONLY to the exact original CS | A dog only salivating to a specific pitch of tone |

**Higher-order conditioning** extends the chain further: a brand new neutral stimulus is paired with an **already established** CS rather than the original US. This creates a secondary conditioned response, though it is typically weaker.

> **Common pitfall:** Treating extinction as permanent erasure. **Spontaneous recovery** proves the memory is only suppressed, explaining why clinical relapses after therapy are common.

## Practice questions

7 of this lesson's 12 practice questions, with answers. The full set is in the app.

### 1. Trace the life cycle of one conditioned association, in order.

**Answer:**

1. Acquisition: a tone is repeatedly paired with food until it triggers salivation
2. The tone is now a conditioned stimulus reliably producing salivation
3. Extinction: the tone keeps arriving with no food behind it, and salivation dies away
4. A rest period passes with no tone presented at all
5. Spontaneous recovery: the tone briefly triggers weak salivation again

**Why:** Acquisition builds the CS-CR link, extinction weakens it when the CS appears alone, and after a rest spontaneous recovery briefly revives it. That revival, coming AFTER extinction and a delay, is what proves the association was suppressed rather than erased.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/trace-the-life-cycle-of-one-conditioned-association-in-order

### 2. Sort each described response by whether it shows generalization or discrimination.

**Answer:**

- Generalization: A combat veteran flinches at fireworks, thunder, and any sudden loud bang, A baby scared by one barking dog now cries at every dog
- Discrimination: A cat comes running only to ITS own can opener, ignoring similar kitchen sounds, A child learns to fear only the neighbor's specific dog, not other dogs

**Why:** Responding to a whole class of similar cues is generalization; responding only to the precise original cue is discrimination. The giveaway is whether the response has spread outward or been narrowed to one specific stimulus.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/sort-each-described-response-by-whether-it-shows-generalization-or

### 3. Select every statement that is TRUE about classical conditioning.

A. Higher-order conditioning pairs a new neutral stimulus with an already-established CS.
B. Stimulus generalization means responding to stimuli similar to the CS.
C. Acquisition is generally strongest when the neutral stimulus slightly precedes the US.
D. Once a conditioned fear has been extinguished, nothing of the original learning remains.
E. Spontaneous recovery proves the association was completely forgotten.

**Answer:** A. Higher-order conditioning pairs a new neutral stimulus with an already-established CS.; B. Stimulus generalization means responding to stimuli similar to the CS.; C. Acquisition is generally strongest when the neutral stimulus slightly precedes the US.

**Why:** Predictive timing in acquisition, generalization to similar cues, and higher-order conditioning are all correct. Extinction does not erase the association, and spontaneous recovery shows it was NOT forgotten - those two options embed the lesson's central misconception.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/select-every-statement-that-is-true-about-classical-conditioning

### 4. A rat that falls ill **hours** after eating a novel food avoids it thereafter, from one trial, across a delay that ordinary conditioning cannot bridge. Why does taste aversion break the rules?

A. Because taste is processed faster than other senses, compressing the interval
B. Because the finding failed to replicate and is no longer accepted
C. Because animals are biologically prepared for ancestral associations
D. Because the rat is reasoning about causes rather than forming an association

**Answer:** C. Because animals are biologically prepared for ancestral associations

**Why:** Not all associations are equally learnable. Garcia's rats link taste to illness in one trial across hours, and cannot link a light to the same illness at all, so the organism arrives prepared for the pairings that mattered. That killed the idea of conditioning as a blank general-purpose mechanism.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/a-rat-that-falls-ill-hours-after-eating-a-novel-food-avoids-it

### 5. A dog is conditioned to salivate at a tone, then the association is extinguished, then it reappears. Order the events in the life of that one association.

**Answer:**

1. The tone means nothing and produces no salivation.
2. The tone is repeatedly followed by food, and salivation to the tone appears.
3. The tone is now presented alone, and salivation to it fades away.
4. A day passes with no tone and no food at all.
5. The tone is sounded again and salivation returns, weaker than before.

**Why:** The last two steps are the informative ones. Nothing whatever happened during the delay - no tone, no food, no training of any kind - and yet the response came back. That is spontaneous recovery, and it is the clearest evidence available that extinction did not erase anything.

What extinction laid down was a second, competing association, and the second one fades faster than the first. After a rest the older learning is once again the stronger of the two, and the response returns.

The practical consequence runs right through this lesson. A fear that has been extinguished in a clinic has not been deleted; it has been overlaid, and the overlay is the more fragile of the two. That is why relapse after successful exposure therapy is expected rather than a sign that the treatment failed.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/a-dog-is-conditioned-to-salivate-at-a-tone-then-the-association-is

### 6. A client is successfully treated for a spider phobia in a clinic and is fine for months. Walking in a park one autumn, the fear returns in full. Why does the return of fear follow from what extinction actually does?

A. Because extinction weakens the association gradually, so enough time without treatment allows it to decay back.
B. Because extinction lays down competing learning, it does not erase.
C. Because the treatment was incomplete, and a fully extinguished fear could not return under any circumstances.
D. Because the client must have encountered a spider frightening enough to condition the fear a second time.

**Answer:** B. Because extinction lays down competing learning, it does not erase.

**Why:** Extinction feels like erasure and is not: the clinic taught a second association — in this room, with this therapist, spiders predict nothing — which now competes with the original. One fact explains three phenomena: spontaneous recovery, renewal in a new context, reinstatement after a fright. It is why exposure therapy deliberately varies the setting.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/a-client-is-successfully-treated-for-a-spider-phobia-in-a-clinic-and

### 7. Because extinction erases the original conditioned fear, a client who has lost a phobia in therapy is not expected to relapse.

**Answer:** False

**Why:** False. Extinction lays down *new* inhibitory learning on top of the original, which survives underneath, hence spontaneous recovery, renewal in a new context, and reinstatement after a stressor. This is precisely why exposure therapy is practised across multiple contexts rather than one.

Page: https://tryals.app/practice/psychology-i/classical-conditioning/because-extinction-erases-the-original-conditioned-fear-a-client-who