# Persuasion and Attitude Change: The Art of Influence

Psychology I · Social Psychology · https://tryals.app/learn/psychology-i/persuasion-and-attitude-change-the-art-of-influence

## Two Roads to Yes

Persuasion is changing attitudes through communication. The **Elaboration Likelihood Model (ELM)** shows it travels one of two routes based on how deeply the audience thinks.

| Route | Trigger | Relies On | Outcome |
| --- | --- | --- | --- |
| **Central** | Motivated & able | Argument quality | Durable & resistant |
| **Peripheral** | Unmotivated / unable | Superficial **cues** | Fragile & short-lived |

**Peripheral cues** include attractiveness, expertise, number of arguments, and emotional tone. Cialdini cataloged six triggers: **reciprocity**, **commitment**, **social proof**, **authority**, **liking**, and **scarcity**.

## Matching the Route

A common **pitfall** is assuming the central route is always better. Route choice depends entirely on the audience's motivation and ability, not the message's virtue.

For a distracted or rushed listener, peripheral cues are often the only way to reach them. The core skill of influence is matching your strategy to the listener's current state.

When listeners care and have time, lead with strong logic and evidence. When they are checked out, leverage credibility and emotional resonance.

## Practice questions

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

### 1. People given a **weak** version of a counter-argument, then shown how to refute it, later resist the strong version better than people who heard only supporting material. Why?

A. Because attitudes are strengthened by practising a defence
B. Because the weak argument makes the opposing side appear generally weak
C. Because repetition of the topic is what produces the resistance
D. Because people dislike being argued with and become entrenched

**Answer:** A. Because attitudes are strengthened by practising a defence

**Why:** A small dose provokes the defence without overwhelming it, the same logic as immunisation, and McGuire named it deliberately. It is why pre-bunking outperforms debunking: showing someone the manipulation technique in a mild form beforehand beats correcting them after they have accepted the strong version.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/people-given-a-weak-version-of-a-counter-argument-then-shown-how-to

### 2. Match each piece of real-world appeal copy to the principle of persuasion it exploits.

**Answer:**

- A charity encloses a small unconditional gift with its appeal letter → Reciprocity
- 'Sale ends at midnight - final three seats at this fare' → Scarcity
- 'You signed our pledge last year; here is the natural next step' → Commitment and consistency
- 'Join the 40,000 people who have already switched' → Social proof

**Why:** A gift creates an obligation to repay (reciprocity); a closing window creates urgency (scarcity); invoking a previous commitment makes refusal feel inconsistent (commitment and consistency); and a large crowd of adopters supplies social proof. All four are peripheral cues, which is why they work best on audiences who are not scrutinising the argument.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/match-each-piece-of-real-world-appeal-copy-to-the-principle-of

### 3. Under the Elaboration Likelihood Model, an audience affected by a policy next year is persuaded by argument strength, while an audience affected in ten years is persuaded by the speaker's credentials. Why does the same message work through different features for the two groups?

A. Because personal relevance determines motivation to think carefully.
B. Because credentials are a better guide than argument quality.
C. Because the distant audience is less intelligent and cannot evaluate arguments.
D. Because argument strength only affects short-term attitudes.

**Answer:** A. Because personal relevance determines motivation to think carefully.

**Why:** The route is chosen by the listener rather than the speaker: an audience affected next year has reason to think it through, so argument quality dominates and weak arguments backfire. What matters is the difference in what each produces, centrally processed attitudes are durable and predict behaviour, peripheral change is easily reversed by the next confident-sounding source.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/under-the-elaboration-likelihood-model-an-audience-affected-by-a

### 4. Central processing requires both motivation and ability. Why does an audience with high motivation and low ability fall back on peripheral cues just as an unmotivated audience does?

A. Because both motivation and ability are needed for central processing.
B. Because a highly motivated audience is more suspicious and therefore discounts strong arguments.
C. Because ability is the only real requirement, and motivation plays no independent role.
D. Because motivation without ability produces confusion, which makes people reject the message entirely.

**Answer:** A. Because both motivation and ability are needed for central processing.

**Why:** The two requirements are conjunctive, so failing either sends the listener peripheral. A patient facing a serious diagnosis is as motivated as an audience gets, and a set of hazard ratios they cannot interpret leaves motivation nothing to work with. Which complicates the usual moral, much peripheral processing is not laziness but what remains when someone cares and lacks the expertise.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/central-processing-requires-both-motivation-and-ability-why-does-an

### 5. Select every statement that follows from the Elaboration Likelihood Model.

A. The sheer number of arguments, whatever their quality, is a peripheral cue.
B. The peripheral route is always inferior, whatever the audience.
C. For a distracted audience, peripheral cues may be the only lever.
D. Central-route change resists later counter-persuasion.
E. High motivation but no ability to evaluate still takes the central route.

**Answer:** A. The sheer number of arguments, whatever their quality, is a peripheral cue.; C. For a distracted audience, peripheral cues may be the only lever.; D. Central-route change resists later counter-persuasion.

**Why:** Durability, the practical value of peripheral cues, and argument-COUNT as a cue all follow. The peripheral route is not inferior in itself - the skill is matching the route to the listener. And motivation without ability, such as an eager patient handed dense jargon, sends the message peripherally despite the eagerness.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/select-every-statement-that-follows-from-the-elaboration-likelihood

### 6. Rank these four audiences from MOST likely to process a message by the central route down to LEAST likely, weighing both motivation and ability.

**Answer:**

1. A postgraduate with a free afternoon, reading a paper in her own specialism.
2. A shopper comparing two washing machines she intends to keep for a decade.
3. A commuter half-listening to a radio advert for a product she may never buy.
4. A person walking along, glancing at a banner advert written in a language she barely reads.

**Why:** The postgraduate has maximum motivation and maximum ability; the shopper has real stakes but less expertise and time; the commuter has neither much interest nor much attention; the final case is distracted, uninterested and unable to decode the message at all. Ranking them forces you to apply both ELM criteria rather than just asking who is paying attention.

Page: https://tryals.app/practice/psychology-i/persuasion-and-attitude-change-the-art-of-influence/rank-these-four-audiences-from-most-likely-to-process-a-message-by