Once you learn a new word, you suddenly see it everywhere. The world didn't change—your brain did.
Interesting, right? Now let's see if you can find this word...
The word was in the EXACT SAME POSITION in Phase 1.
But you didn't notice it because your brain wasn't primed to look for it.
Deep in your brainstem lies a network of neurons called the Reticular Activating System. It's your brain's gatekeeper—filtering the ~11 million bits of sensory information you receive every second down to the ~50 bits you consciously process.
When you learn something new and interesting, your RAS marks it as "important." Suddenly, that information passes through the filter. The world hasn't changed—your filter has.
1. Selective Attention: Your brain starts actively scanning for the new concept, elevating it above the noise of daily experience.
2. Confirmation Bias: Each time you notice it, you think "See? It IS everywhere!"—reinforcing the illusion that frequency has increased.
In 1994, a reader named Terry Mullen wrote to the St. Paul Pioneer Press describing a strange coincidence: after hearing about the Baader-Meinhof Group (a German militant organization from the 1970s) for the first time, he suddenly started seeing references to them everywhere.
The name stuck, even though the phenomenon has nothing to do with German terrorists. In 2005, Stanford linguist Arnold Zwicky gave it the more scientific name "frequency illusion."
But the catchy original name persists—perhaps because once you hear "Baader-Meinhof phenomenon," you start noticing references to it everywhere too. Meta, isn't it?
The frequency illusion can lead us to see patterns where none exist. After learning about a disease, every minor symptom becomes evidence. After a breakup, every song seems to be about heartbreak.
Once primed to look for "evidence" of a conspiracy, people start noticing "connections" everywhere. The more they look, the more they find—not because the conspiracy is real, but because their filter is now tuned to it.
A psychiatrist who just learned about a new diagnosis may start seeing it in every patient. A security analyst primed for threats may see attacks where none exist. Awareness of the frequency illusion is crucial in any field involving pattern recognition.
Advertisers deliberately exploit this effect. After researching a product, you'll notice ads for it everywhere—partly due to tracking, but partly because your brain is now primed to notice what it ignored before.
Learning: When studying a new subject, the frequency illusion becomes your ally. Once you learn a concept, you'll notice its applications everywhere—reinforcing your understanding.
Goal Setting: Write down your goals and read them daily. Your RAS will start filtering for opportunities related to those goals that you would have missed before.
Gratitude Practice: Focus on things you're grateful for, and you'll start noticing more things to be grateful for. Your brain literally changes what it shows you.
When you notice something "everywhere," ask yourself: Did it actually increase, or did my attention to it increase? This simple question can prevent false pattern recognition and keep your reasoning grounded in reality.
The Baader-Meinhof phenomenon reveals something profound: we don't experience reality directly. We experience a heavily filtered version, shaped by our recent experiences, interests, and expectations.
Two people can walk down the same street and see completely different worlds. The musician notices the street performer; the architect notices the building facades; the parent notices the playground safety hazards.
What you notice is what you become. Choose your filters wisely.
Now that you know about the Baader-Meinhof phenomenon...
...you're going to start noticing it everywhere. 😉