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Issue #18
I was reading a headline about "5 Foods a Dermatologist Would Never Eat," and halfway through the second food, I stopped and asked myself a real question: why am I still here? I don't follow this dermatologist. I don't follow any dermatologist. And yet six words had me two foods deep into a list I had zero stake in finishing.
I didn't click because I cared about the answer. I clicked for a whole other reason. (See what I did just now?😉)
The Mechanism & Some History
There's a name for the itch that sentence creates, and it comes from a slightly unglamorous place: a Vienna café, sometime in the 1920s.
A psychologist named Bluma Zeigarnik noticed that waiters could recite a table's entire order back in perfect detail, every substitution, every "no onions" — right up until the bill was paid. Ask them five minutes after the table left, and it was gone. Completely. She took this observation into her lab, had people work through simple tasks, interrupted half of them before they finished, and let the other half complete their tasks uninterrupted. The group that got interrupted, surprisingly, remembered what needed to be done nearly twice as well as the group that got to finish uninterrupted.
An unfinished task doesn't just sit there quietly. It stays locked and loaded in your head, waiting to be closed. A finished one gets filed away and forgotten almost immediately. This became known as the Zeigarnik effect. This phenomenon took little to no time for people who built serialized radio dramas in the golden age of radio to figure out what they had on their hands: end an episode mid-crisis, and the audience shows up next week not out of loyalty, but because their brain never got to put the story down.
That's a hook. It's not a clever sentence. It's an unfinished task you didn't agree to take on.
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You've Been Hooked More Than You Think
Email Subject Lines get maybe six words to do it: "We tried to charge your card" opens a loop involving your money before you've had your morning coffee. "1 item left in your cart" isn't information; it's a countdown with no real clock and urgency bubbling underneath that hook.
Old-School Ad Copy ran this trick a hundred years before anyone had a word for it. A famous piano-lesson print ad from the 1920s showed a guest sitting down at a party, people whispering and everyone expecting him to embarrass himself. Then he started to play, beautifully. The headline read: “They Laughed When I Sat Down At The Piano But When I Started To Play!~” The curiosity begins in that headline. It sold piano courses for decades.
BuzzFeed Listicles turned it into an industry. "21 Photos That Prove You Grew Up in the '90s," "You Won't Believe What This Dog Did Next." For a while it was genuinely effective, a headline with a piece missing, dangled in front of a scrolling thumb. Then everyone learned the trick at once, every headline started doing it, and the loop stopped feeling like curiosity and started feeling like a chore. Oversaturation didn't kill the mechanism. It just taught an entire generation to recognize the shape and roll their eyes at it on sight.
Social Captions do the slow version: "This one tip changed everything for me," but the tip is withheld until slide four. TikTok built an entire grammar around it: wait for it. YouTubers with videos like “How I Made $2,000 in 24 Hours,” then make you wait 17 minutes till they explain a system they’ve been working on already for months.
Even A Jingle Can Have This Open-Loop Power. Hum the first five notes of one you grew up with and stop. Something in you — or in the person next to you — wants to finish it. It’s instinctual because it's open, and an open thing wants to be closed.
The Line
A hook is a debt. The honest version pays the debt in full. You open the loop, you close it, the reader walks away with the facts, the story, the punchline they were promised. That's just good writing borrowing a psychology term.
The dishonest version keeps the loop open on purpose. Clickbait doesn't want to close the gap because closing it ends the relationship. So the "shocking secret" turns out to be a moisturizer you already own, the countdown resolves into an upsell, and you scroll past four more open loops before you find out none of them were going anywhere. The tension was the entire product. Curiosity got harvested instead of satisfied.
Next time something makes you click before you've decided to, it's worth a half-second of noticing: what did that sentence promise you, and is it actually going to pay it off?
Till next Wednesday,
~Aliya