MENTAL MODEL · M2257

Baader-Meinhof Phenomenon

Learn & MetacognitionHigh supportCognitive Science

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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Also known as the "frequency illusion." When you learn a new word or buy a new car, you suddenly notice it everywhere. It's not because it has become more frequent, but because your reticular activating system (RAS) has started to pay attention to it.

SCAFFOLDING EFFECT

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Opportunity radar. If you want to spot opportunities, first implant the "keywords of opportunity" in your mind. Unless you first possess it mentally, you won't see it in reality.

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This phenomenon stems from the brain's "reticular activating system" (RAS) and selective attention: once a concept enters consciousness, the brain increases its salience, making related stimuli more likely to be noticed and recalled, creating the illusion that "it has become more frequent." Essentially, it is an attentional bias, not an objective change in frequency.

MINIMUM ACTION

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Practice this model in one real situation:

Clearly define the area or keywords you want to focus on and actively "implant" them in your mind
Record relevant instances you encounter over the next period
Distinguish between "the number of times noticed" and "the actual number of occurrences" to avoid misjudging trends. This can be used for deliberate practice in opportunity awareness.

Check to track your progress (stored locally)

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Source support: Explicit

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en.wikipedia.orghttps://en.wikipedia.org/wiki/Frequency_illusionZH · Explicit
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