There is a particular kind of grief that nobody sends flowers for. It's the morning you realize you no longer want to do the thing you used to do for free. Maybe it was the guitar, the sourdough, or the long novels you read under a blanket until two in the morning. Somewhere along the way it became a side hustle, a streak, a yearly reading goal, or a portfolio piece. You didn't quit it. You just stopped wanting it, and you can't work out when that happened or what it says about you.

It probably says very little about you. It says a lot about a quiet mechanism that psychologists have studied for more than fifty years. It's called the overjustification effect, and once you can see it, you'll find it in your hobbies, your work, how you parent, and maybe in how you've learned to measure your own worth.

The children who stopped drawing

In the early 1970s, the psychologists Mark Lepper, David Greene and Richard Nisbett watched preschoolers who already loved to draw. They picked out children who reached for the markers during free play without being asked. Then they split them into groups. Some were told ahead of time that they'd get a "Good Player" certificate with a gold seal and a ribbon if they drew. Some got the same certificate as a surprise afterward. Some got nothing.

The researchers then went back to the classroom days later, when the markers were simply sitting out again and nobody was offering anything. The children who had expected the reward now spent noticeably less of their free time drawing than before. The children who were surprised by a reward, and the ones who got none, kept drawing about as much as ever.

Nothing about the markers had changed. What changed was the children's sense of why they drew. Before, drawing was its own reason. After the deal, drawing was something you did to get a certificate. Once there was no certificate on offer, there was no longer any obvious reason to pick up a marker.

Around the same time, Edward Deci found something similar in adults working on absorbing block puzzles. People who were paid per puzzle solved spent less time on the puzzles once the payment stopped, during a stretch when they thought nobody was watching. The unpaid group kept playing.

Why a reward can rewrite the story

The simplest explanation comes from self-perception theory, Daryl Bem's idea that we often work out our own motives the way an outsider would: by looking at what we do and the situation around it. If I'm doing something with no outside reason, I conclude that I must enjoy it. If someone is paying me, praising me, or tracking my numbers, there's now a simpler explanation available. I'm doing it for that. The outside reason "overjustifies" the behavior, and the inside reason fades into the background.

Deci and Richard Ryan took this further in what became cognitive evaluation theory, part of their broader self-determination theory. Their key point is that a reward isn't simply good or bad. What matters is how it feels. A reward that feels controlling, a lever someone is pulling to make you behave, wears away your sense of autonomy, and autonomy is one of the basic psychological needs that keep intrinsic motivation alive. A reward or a piece of feedback that feels informational, that tells you something true about your growing competence, can actually strengthen it.

That difference matters. A large 1999 meta-analysis by Deci, Koestner and Ryan found that tangible rewards people expected and that depended on doing or finishing the task tended to undermine intrinsic motivation. Unexpected rewards generally did not. Positive verbal feedback often helped. Researchers have argued about the boundaries for decades, and the effect isn't universal. Rewards don't hurt tasks people find boring to begin with, for example. Still, the central finding has held up: when you attach a contingent, expected reward to something you already love, you risk swapping your reason for doing it.

Where it hides in an ordinary life

You probably don't hand yourself gold-seal certificates. But look at the modern versions.

The reading challenge. You set a goal of fifty books a year. Somewhere around September you notice you're picking shorter books, skipping the big novel you've wanted to read for a decade, and feeling a small sting of failure when a book is good but slow. Reading used to be a door. Now it's a counter.

The streak. The language app's flame icon is the reason you open it at 11:58 p.m. One day the streak breaks, and you're surprised by how little you want to continue. Without the number, it's hard to remember why you were doing it.

The monetized hobby. People say "turn your passion into income" as if it were free. Sometimes it works out. Often the pottery wheel stops being where you lose track of time and becomes a place full of invoices, client taste, and the private question of whether this piece will sell.

The child's piano lessons. Stickers for practice, screen time for every half hour. The practice happens. Then the stickers stop, and so does the playing.

The emotional cost here is easy to miss. When something you loved goes flat, it's tempting to decide you were never really that kind of person: not a real reader, not a real artist, not disciplined, not curious. But the evidence points somewhere kinder. The curiosity was real. It got buried under a new reason.

The quiet link to self-worth

The overjustification effect hits hardest in people who've learned to feel valuable only when they're producing. If your sense of being okay depends on output you can show, every pleasure starts to look like a chance to perform. Hobbies turn into proof. Rest turns into recovery so you can do more. Curiosity, which is basically wanting to know something for no reason at all, starts to feel like a luxury you haven't earned.

Self-determination theory gives you a gentle way out. You don't need to get rid of every goal. The aim is to make sure at least some parts of your life run on autonomy: you chose them, nobody is keeping score, and they serve no purpose beyond themselves. Curiosity grows there because it has nothing to prove.

Getting the original reason back

The research suggests some practical levers. You can make rewards unexpected instead of contingent. You can turn controlling feedback into informational feedback. Above all, you can give yourself back the sense that you are choosing this, and choosing it for its own sake.

A useful habit is to look at any measurement you've attached to something you love and ask: Is this telling me something, or is it telling me what to do? "I noticed I've read more poetry this year" is information. "I'm three books behind schedule" is control. The activity is identical, but the inner experience is not.

It also helps to lead with questions, not targets. A target asks how much. A question asks what about this pulls at me? Questions point attention back at the thing itself, at the texture of the clay or the strange sentence in chapter four, and that's exactly where intrinsic motivation lives.

Your next moves

  • Audit one beloved activity tonight. Write down every metric, streak, goal, or payment now attached to it. Next to each one, mark it "informs me" or "controls me." Turn off or delete one controlling item this week, such as a streak notification, a yearly book count, or a public progress tracker.
  • Create a "for nobody" zone. Pick one hobby or one hour a week that is explicitly never shared, posted, sold, or counted. Tell yourself the rule out loud. The point is to give the activity back its only reason: you wanted to.
  • Swap a target for a question. Instead of "read 30 pages," write down one thing you're genuinely wondering about the book, the craft, or the subject. Then go looking for the answer. Let that question set how long you stay, not the page count.
  • If you reward someone else, make it a surprise. With kids, partners, or a team, drop the "if you do X, you get Y" deals for things they already enjoy. Celebrate unexpectedly, and make your praise specific and informational, like "you found a really interesting way to resolve that chord", rather than a payout.
  • Re-remember the first spark. Spend five minutes writing down the moment you first fell for this thing: where you were, what caught you, and what you were curious about. Keep the note where you'll see it the next time the activity feels like a chore.

A place to keep the questions

The hardest part of protecting your curiosity is that the world keeps offering to measure it for you. Curiokit was built on the opposite idea: a quiet space to collect the questions that pull at you and follow them because you want to, without quotas, leaderboards, or turning wonder into work. If you've felt something you love go flat and you'd like a gentle way back to the reason it mattered in the first place, you can explore it at curiokit.lumenlabs.works.