You learn the name of a rare dog breed and within a week you spot it three times on the street. You decide to buy a particular car and suddenly the roads are full of it. This is the Baader-Meinhof phenomenon, also known as the frequency illusion: the impression that something has suddenly become far more common, when in reality you're simply noticing it more.
Two brain mechanisms sit behind it. The first is selective attention: once something becomes meaningful to us, the brain "flags" it and separates it from the noise. The second is confirmation bias: each new appearance confirms the sense of "there it is again!", while the times it doesn't appear don't get counted at all.
In most cases the phenomenon is harmless, even fun. It becomes interesting, though, when we consider how the same pattern works with emotions. When we worry about something, we start seeing "proof" of our fear everywhere. When we feel rejected, every silence looks like confirmation. The mind finds what it's looking for.
Being aware of this gives us a useful question: "Am I just noticing it more, rather than it actually happening more often?" That small pause helps us avoid being swept along by every pattern we think we see. If you'd like to work on the way you think, take a look at our services.