Module 8 · Influence & persuasion · Lesson 6 of 11

Social proof and authority

We look to others and to experts when unsure. When that helps, and when it misleads.

7 min read · Level: Practising · Free — no account needed to read

The idea

Social proof: when unsure, we look at what others are doing. A busy restaurant seems better than an empty one. It is often sensible — and easily faked with fake reviews, bought followers or “everyone is doing it”.

Authority: we tend to trust experts, uniforms and titles. That usually helps — doctors do know more about medicine — but a title or a confident manner is not evidence. The useful question is: does this person actually know about THIS, and what do they gain?

Why it matters

Both shortcuts shape everyday decisions, and both are among the most common tools of misinformation and scams.

See it happen

A video with millions of views, presented by someone in a lab coat, claims a drink cures tiredness.

The first reaction

It seems convincing — so many people watched it and the presenter looks like a scientist.

With the idea

Mim checks who the presenter is and finds they sell the drink. The views were not evidence and the lab coat was a costume.

What changed

Asking “what do they know, and what do they gain?” cut through both shortcuts.

Easy to get wrong

• Treating popularity as proof.
• Trusting confidence and titles over evidence.

Different perspectives

Reasonable people disagree here. None of these is presented as the answer.

Sensible shortcuts

Following others and trusting genuine experts saves time and usually leads to good decisions.

Dangerous when faked

Fake crowds and fake authority are central to scams and misinformation; the shortcut is only as good as the signal behind it.

Where this comes from: Robert Cialdini — Influence (1984, expanded 2021); Solomon Asch & Stanley Milgram — conformity and obedience studies.

Try it now: Check the signal

1. Think of something you believed because many people did, or an authority said so.
2. Write what evidence actually supports it.
3. Write what the source gains if you believe it.

Questions to think about

• Whose authority do you accept without checking?
• When has “everyone is doing it” led you somewhere you regretted?

Your challenge this week

Before sharing or buying something this week, check who is behind it and what they gain.