Rhetorical Devices
A rhetorical device is a choice, not a decoration. It should do something for a specific audience: make an idea memorable, expose a contrast, create urgency or make an abstract problem concrete. If you cannot say what a device does, cut it.
Devices worth knowing
| Device | What it does | Example | Risk |
|---|---|---|---|
| Repetition | Makes a word or phrase stick and builds rhythm. | "Every day. Every lunchtime. Every bin." | Becomes noise if the repeated phrase carries no new weight. |
| Rule of three | Creates a sense of completeness and momentum. | "Clear, fair and affordable." | Can make a weak third item sound equivalent to two strong ones. |
| Contrast | Sharpens a choice by placing two things side by side. | "Not a ban. A better option." | Creates a false either-or if other options exist. |
| Direct address | Puts the audience inside the message. | "You already know the walkway is too hot." | Can feel accusatory or presumptuous. |
| Rhetorical question | Invites the audience to supply the answer. | "Why should students choose between shade and safety?" | Can feel manipulative when the answer is not genuinely open. |
| Metaphor and simile | Makes an abstract issue concrete by comparison. | "The walkway is a heat trap." | Can oversimplify or imply a false equivalence. |
| Personification | Gives an idea or object agency and emotional weight. | "The timetable is eating the lunch break." | Can obscure who is actually responsible. |
| Hyperbole | Amplifies for emphasis or humour. | "We have been waiting since the beginning of time." | Damages credibility when the audience takes it literally. |
| Understatement | Invites the audience to feel the gap between words and reality. | "A slightly warm walk in January." | Can be missed, or read as indifference. |
| Call to action | Turns agreement into a specific next step. | "Sign the noticeboard sheet by Friday." | Vague or unrealistic asks produce no action. |
Devices in a sentence
Do not label a device and stop there. Use this frame:
Choice → effect → audience → purpose. The writer uses [device] in [quotation] to [effect] for [specific audience], so that [purpose].
Model. The campaign repeats "every lunchtime" to make the waste feel routine rather than exceptional; for students who see the bins daily, the repetition turns a background nuisance into a pattern they can no longer ignore.
Worked example: same claim, three treatments
| Treatment | Text | Effect |
|---|---|---|
| Plain | "The canteen should offer smaller portions." | Clear but easy to scroll past. |
| Contrast and rule of three | "Less waste, less guilt, more choice." | Memorable and upbeat, but the third item needs explaining. |
| Direct address and question | "You would not order a meal you cannot finish. Why should the canteen?" | Personal and provocative, but risks blaming students rather than the system. |
The best treatment depends on the audience and the medium. A poster can carry a short contrast; a speech can build a longer pattern of repetition; a social post needs the claim in the first line.
Devices to use with care
| Device | Why it is risky | Ethical alternative |
|---|---|---|
| Fear appeal | Can overwhelm judgement and stigmatise a group. | State the risk accurately, then show a feasible response. |
| Shock imagery | Can distress audiences or exploit someone's suffering. | Use consented, context-rich images or a restrained diagram. |
| False urgency | Pressures people before they can check the facts. | Give a real deadline and explain why it matters. |
| Name-calling | Attacks people rather than the argument. | Describe the behaviour or decision you disagree with. |
| Testimonial from a celebrity | Borrows authority that may be irrelevant. | Use a qualified source and explain their connection to the issue. |
Device audit
| Device I used | Exact words or image | Intended effect | Did the test audience notice it? | Keep, change or cut |
|---|---|---|---|---|
Common errors
- Device hunting. Finding a device in a text but not explaining its effect.
- Decorative overload. Stacking devices until the message disappears.
- Mismatch. Using a playful device for a serious issue, or a solemn one for a light campaign.
- Borrowed slogans. Reusing a famous line instead of writing one that fits the issue.
- No ask. Ending with a feeling rather than an action the audience can take.
Use the campaign strategy page to decide which devices your audience and channels actually need.