Why some songs get stuck in your head, and what that means for your hook

What makes an earworm

In a study published by the American Psychological Association, researchers led by Kelly Jakubowski at Goldsmiths, University of London asked around 3,000 people to name the songs that most often got stuck in their heads. They compared those songs with equally popular songs that nobody named. The earworms tended to:

• Be faster in tempo.
• Follow common melodic shapes: the ups and downs most listeners already expect, which makes them easier to recall.
• Include something unusual in the intervals, such as more leaps or larger leaps than an average pop melody.

In other words: familiar enough to follow, different enough to remember.

The dopamine of anticipation

In a 2011 study in Nature Neuroscience, researchers at McGill University scanned the brains of people listening to music that gave them chills. They found dopamine was released at the emotional peak, and also in the moments before it, while listeners were anticipating it.

For a songwriter, that's a useful idea: the build matters as much as the drop. Setting up an expectation, then paying it off, is part of what makes a moment feel good.

Repetition and familiarity

Psychologists have long described the mere-exposure effect: people tend to prefer things they've encountered more often. It's part of why choruses repeat, and why a song can grow on you after a few plays.

What to take from this

• Give your hook a shape people can predict and one detail they can't.
• Build towards your biggest moment so the payoff lands.
• Use repetition on purpose, then put the hook in the first seconds of your Reel, so the familiarity starts there.

These are patterns across many songs, not rules. They explain why a hook works; they don't guarantee one.