PhenomenonAttention & information · Availability Heuristic · Entry 11

Frequency Illusion – when something new suddenly appears everywhere

Electric editorial collage illustrating Frequency Illusion

Did you recently learn about something and now it seems to be everywhere? That’s Frequency Illusion (also known as the Baader-Meinhof Phenomenon) – a cognitive bias that makes us think something appears more frequently than before, when in reality we’ve just started noticing it.

Where it can show up


- Shopping – you learn about a new phone model, and suddenly everyone seems to have it.
- Names – you meet someone with a rare name, and now you hear it everywhere.
- Trends – you hear a new term, and suddenly it’s being used all around you (even though it was always there).

A practical countermeasure


- Recognize that your brain is playing tricks on you – things aren’t appearing more often, you’re just noticing them more.
- Focus on data, not feelings – if something seems more frequent, check the actual numbers.
- Be skeptical of your memory – just because something caught your attention doesn’t mean it became more common.