Frequency Illusion
After noticing or learning something, you may begin seeing it repeatedly and infer that it has become more common. The frequency illusion occurs when increased attention is mistaken for increased occurrence.
THE IDEA
Definition
The frequency illusion (also known as the Baader-Meinhof phenomenon) happens when a phrase, a name, or something you’ve just learned unexpectedly appears all over the place. After learning something new, people suddenly start noticing it in many contexts, leading them to believe it has become more frequent. The frequency need not have changed: increased attention alone can make the item seem more common.
How It Works
This illusion arises from two psychological processes:
- Selective attention: Your brain prioritizes recent or salient information, scanning the environment for it.
- Confirmation bias: Each time you notice the item, you reinforce the belief that it’s now more common, ignoring all the times you didn’t see it before.
Example
Now that you know what that SAT word means, you see it in so many places—books, articles, conversations—where you would have previously glossed over it.
When to use it
Checking whether a brand seems more common because you recently became aware of it.
Noticing familiar vocabulary in material where you previously overlooked it.
Consumers overestimating the prevalence of a product after purchasing it
Misinterpreting news coverage spikes as genuine event increase rather than editorial focus
FROM THEORY TO EVERYDAY LIFE
In practice
SAT Word
After learning a new vocabulary word for the SAT, you suddenly notice it appearing in books, articles, and conversations repeatedly, even though it was likely there all along.
New Car
You decide to buy a red Toyota Camry. Once you make the purchase, you start seeing red Camrys on every street, giving the impression the model has become more popular overnight.
A MOMENT TO REFLECT
Put it to work.
Can you recall a recent instance where you learned a new term and then saw it everywhere? How did that affect your perception?
How might the frequency illusion lead to false beliefs about trends or patterns in everyday life?
What steps can you take to check whether an increased occurrence is real or simply a cognitive bias?
CONTINUE THE CONVERSATION
Source texts
- 60 Cognitive Biases That Ruin Everything We Do by David Scott