Cognitive biases & decision-making · law 078
Baader–Meinhof Phenomenon
Also known as: Frequency illusion
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
what it means
After you notice something for the first time, you start seeing it everywhere — and wrongly assume it has become more common.
How Baader–Meinhof Phenomenon works
Your brain's attention system starts flagging something new as relevant, so you notice it more. Combined with confirmation bias, you believe it is suddenly everywhere.
Marketers benefit from it — once customers notice a brand, they see it more — but owners should be careful about mistaking personal noticing for market trends.
where it comes from
The name comes from a 1994 letter to a St. Paul, Minnesota newspaper by a reader who kept encountering the name of the German militant group. Linguist Arnold Zwicky coined the term ‘frequency illusion’ in 2005.
Baader–Meinhof Phenomenon examples in business
Buying a car
After buying a particular car model, you see the same model all over the road.
Trends
An owner reads about a new business model and suddenly thinks everyone is doing it.
Brand awareness
After a customer sees your ad, they start noticing your shop sign every day.
How to apply it
- 1Before acting on a ‘trend’ you've noticed, check actual data.
- 2Use consistent branding so customers keep noticing you after first contact.
- 3Retarget new visitors so your brand appears again soon after first exposure.
- 4Treat sudden ‘everywhere’ feelings as a prompt to measure, not a conclusion.
common misreading
Sometimes things really are becoming more common — the illusion just means your perception isn't proof.
ask yourself
Which ‘trend’ in your industry have you noticed recently — and do you have data to confirm it?
Frequently asked questions
What is Baader–Meinhof Phenomenon?
After you notice something for the first time, you start seeing it everywhere — and wrongly assume it has become more common. Your brain's attention system starts flagging something new as relevant, so you notice it more. Combined with confirmation bias, you believe it is suddenly everywhere.
Who came up with Baader–Meinhof Phenomenon?
The name comes from a 1994 letter to a St. Paul, Minnesota newspaper by a reader who kept encountering the name of the German militant group. Linguist Arnold Zwicky coined the term ‘frequency illusion’ in 2005.
How do you apply Baader–Meinhof Phenomenon in business?
1. Before acting on a ‘trend’ you've noticed, check actual data. 2. Use consistent branding so customers keep noticing you after first contact. 3. Retarget new visitors so your brand appears again soon after first exposure. 4. Treat sudden ‘everywhere’ feelings as a prompt to measure, not a conclusion.
What is a common misunderstanding of Baader–Meinhof Phenomenon?
Sometimes things really are becoming more common — the illusion just means your perception isn't proof.