Negativity Bias

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You'd be forgiven for thinking this ad is nonsensical.

I've always liked it.

The reverse psychology makes it stick in my mind.

But recently I read a study which explains why it works.

Negative framing.

In 2025, researchers Wallach, Blair and Tanenbaum published a paper titled 'This Article Is Not for Everyone'.

For the study, participants were shown one of the following slogans for a new dark roast coffee.

Half saw positive framing:

'This is the coffee for you if you like dark roast coffee!'

Half saw negative framing:

'This is NOT the coffee for you if you don't like dark roast coffee!'

After reviewing the ads, participants had the choice between:

1. $1 in cash
2. $10 Folgers Noir coffee gift card

Only 27% of those who saw the positive framing picked the coffee gift card.

Yet, 40% of those who saw the negative framing selected the gift card.

Why does this work?

Well, the negative framing made the dark roast drinkers more confident that it'd suit their tastes.

So, why not use negative framing to shift your buyer's perception:

• Making hot sauce? Say it's not for those who can't handle Tabasco.
• Selling a chef's knife? Say it's not for you if you don't own a knife sharpener.
• Promoting cold-water dips? Say it's not for people who want to relax.

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The negativity bias is one of 85 principles you'll find in the Nudge Vaults.​

In fact, inside the Nudge Vaults you'll find 8 more insights specifically about this bias.

But these insights aren't for marketers who don't want to improve their work.

Get access to all 544 insights right now →​

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Cheers,

​Phill​