Mere Exposure Effect
We tend to develop a preference for things merely because we are familiar with them.
The mere exposure effect is a psychological phenomenon by which people tend to develop a preference for things merely because they are familiar with them. In social psychology, this effect is sometimes called the familiarity principle. In studies about attraction, the more exposure one person has to another person, the more attracted they become. This principle drives logo placement, pop music hooks, and retail shelf positioning.
What it looks like in the wild.
- Marketing Logo Omnipresence Brands invest in massive impression volume not to inform but to create familiarity-based preference.
Someone has already built a business on this.
Biases are not only private errors. They are design targets — patterns deliberately engineered into interfaces because they reliably work.
- E-commerce Product Placement Loops E-commerce platforms place certain products in repeated search results even when not most relevant, building purchase intent through familiarity.
Recognising a definition is not the same skill as spotting it.
Two scenarios from the app, with distractors drawn from the same family of biases — which is what makes them hard.
A driver who initially found a new car's handling awkward grows to prefer it after weeks of daily driving, simply because the repeated exposure to the steering and suspension characteristics made them feel natural and responsive over time.
A consumer who initially ignored a particular brand of coffee starts to prefer it after receiving it as a gift and drinking it regularly, simply because the repeated exposure made the flavor profile feel familiar and satisfying to them.
Biases rarely arrive alone.
Understand more. Assume less.
188 biases, 18,869 scenarios, and a record of how you actually decide.
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