Information gap (curiosity)

An open question begs to be closed.

A gap between what we know and want to know creates curiosity.

Loewenstein (1994), The psychology of curiosity.

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What is Information gap?

Information gap is a behavioural bias (experience family): A gap between what we know and want to know creates curiosity. Curiosity rises when people notice a specific gap in their knowledge. Nudgeswipe rates the evidence as mixed. Source: Loewenstein (1994), The psychology of curiosity.

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The research

Curiosity rises when people notice a specific gap in their knowledge. In subject lines and headlines it can lift attention, but the evidence is mixed and it backfires when the payoff disappoints.

● Mixed evidence

Source: doi.org/10.1037/0033-2909.116.1.75

Mixed evidence: effect sizes vary widely across studies. Treat it as something to test, not a law.

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Key takeaways

Honest nudge
Open a gap you close straight away.
Example: Sakuto opens a question in the subject line and answers it in the first line →
Dark-pattern line
Clickbait that doesn't deliver.

Use it

Apply this with your agent

The prompt carries this bias, its evidence rating and the honest-vs-dark line.

You are helping me apply a behavioural bias ethically in my product.

Bias: Information gap (curiosity) (Experience, mixed evidence): A gap between what we know and want to know creates curiosity.
How it works: Curiosity rises when people notice a specific gap in their knowledge. In subject lines and headlines it can lift attention, but the evidence is mixed and it backfires when the payoff disappoints.
Source: Loewenstein (1994), The psychology of curiosity. https://doi.org/10.1037/0033-2909.116.1.75
Honest use: Open a gap you close straight away.
Dark-pattern line: Clickbait that doesn't deliver.
Page: https://nudgeswipe.com/biases/information-gap/ (JSON: https://nudgeswipe.com/api/biases/information-gap.json)

Rules: say a brand "uses" a tactic, never that it "worked"; outcomes are not public unless the company published them; no invented uplift estimates; flag mixed evidence. Honest nudge = true, visible, easy to reverse, and in the user's interest. Dark pattern = hides costs, fakes scarcity or popularity, shames, or makes leaving harder than joining. Quote company-published results as "X reports", with the source link, and don’t generalise them. Don’t cite retracted or failed-to-replicate studies as support (e.g. Ariely & Wertenbroch 2002). Don’t state study figures unless they’re on this page or in a source you can link. If an idea crosses the line, link the matching deceptive.design pattern.

Tasks:
1. Ask me for my product, the flow and the goal.
2. Audit where information gap (curiosity) already shapes that flow, for better or worse.
3. Propose 2-3 ethical experiments: hypothesis, variant, primary metric, guardrail metric.
4. Flag dark-pattern risks. The evidence is mixed, so treat any effect as something to test, not a given.

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Frequently asked questions

What is Information gap?

Information gap is a behavioural bias: A gap between what we know and want to know creates curiosity.

How does Information gap work?

Curiosity rises when people notice a specific gap in their knowledge. In subject lines and headlines it can lift attention, but the evidence is mixed and it backfires when the payoff disappoints.

How strong is the evidence for Information gap?

Nudgeswipe rates it mixed evidence. Original source: Loewenstein (1994), The psychology of curiosity.

How can you use Information gap honestly?

Open a gap you close straight away.

When does Information gap become a dark pattern?

Clickbait that doesn't deliver.

Which brands use Information gap?

Nudgeswipe has 1 teardown of brands using it, including Sakuto Knives. Whether it lifted their results is not public unless a teardown cites it.

In the wild

1 real example

Inbox

Sakuto Knives13 Oct 2026

Ever wondered what makes Damascus blades so special?

Information gapHonest nudge

Sakuto opens a question in the subject line and answers it in the first line

Sakuto Knives · Email

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