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Why you like a song more the fifth time you hear it
💡 We often mistake mere familiarity for genuine liking — repeated exposure quietly nudges our preferences without us noticing.
Ever noticed a song you hated on first listen slowly becoming your favorite? That's the mere exposure effect — a quirk of the mind where we grow to like things simply because we've encountered them before. Psychologist Robert Zajonc demonstrated this in the 1960s, showing people random shapes, foreign words, and faces. The more often someone saw an item, the more they reported liking it — even when they couldn't remember having seen it at all.
The effect works because familiarity feels like safety. To our brains, something we've encountered repeatedly without harm gets tagged as trustworthy and easy to process. This mental ease, called fluency, gets misread as genuine preference. In other words, we mistake "I recognize this" for "I like this."
This explains far more than musical taste. It's why advertisers repeat brand names, why politicians plaster their names on signs, and why you warm up to coworkers you see daily. Notably, the effect is strongest when exposure is subtle and unforced — repetition that feels naggy or overdone can backfire and breed annoyance instead.