The Children Who Stopped Drawing

In the early 1970s, a group of researchers walked into a nursery school with a stack of felt-tip pens and a simple question. They watched which children already loved to draw, then split those children into groups. Some were promised a shiny "Good Player" certificate if they drew a picture. Others were handed the same certificate afterwards, as a surprise. A third group were offered nothing at all.

A couple of weeks later, the pens were left out again during free play. The children who had been promised the award now drew about half as much as the others. The reward had quietly damaged the very thing it was meant to encourage.

Psychologists call this the overjustification effect, which is a clumsy name for an unsettling idea. Reward a child for something they already enjoy, and you can turn play into work.

It matters because rewards fill a modern childhood. Sticker charts on the fridge. A pound for every book read. Screen time earned by finishing homework. Pudding for eating the vegetables. Most of it comes from a good place. We want to steer our children towards the things that are good for them.

What the pens revealed

The felt-tip study, run by Mark Lepper and his colleagues at Stanford in 1973, was not a fluke. In 1999, three researchers gathered 128 experiments on rewards and motivation and looked at them together. The pattern held. When someone was given an expected, physical reward for a task they already found interesting, their appetite for doing it freely tended to fall.

The effect turns up young, and in places you would not expect. In one study, toddlers of around 20 months were given the chance to help an adult who had "accidentally" dropped something. Toddlers are natural helpers, and most will trot over and pick the thing up. But when researchers gave some of them a small toy for helping, those children became less likely to help the next time. The ones who got a warm thank you, or nothing at all, carried on helping.

Something about the toy changed how the child read their own behaviour. A toddler who helps because a person needs help is doing one thing. A toddler who helps to earn a toy is doing another. Take the toy away, and the reason to help goes with it.

Why the sticker steals the fun

The best explanation is oddly human. Young children are always trying to work out why they do things, reading their own actions a bit like a detective reads clues. If the reason is loud and external, I drew because I wanted the certificate, then the quieter reason, I drew because drawing is lovely, gets crowded out.

This is why the details matter so much, and why "rewards are bad" is far too blunt. The felt-tip effect showed up with rewards that were promised in advance and handed over like wages. The surprise certificate, given after the fact, did no harm at all. Praise did no harm either. A specific, honest "you really worked at that" tends to build motivation rather than drain it.

It also depends on whether the child liked the task to begin with. You cannot spoil an interest that was never there. For a chore no child enjoys, tidying the toy box, say, a reward is simply a reward. The danger is narrow but real. It lands hardest on the things your child already loves, which are exactly the things you would least want to ruin.

So should you pay them to read?

Here the picture gets more interesting. The Harvard economist Roland Fryer ran one of the largest experiments ever done on paying children, handing out more than six million dollars across thousands of pupils in four American cities. Paying them for good marks did almost nothing to their marks. But paying younger children a couple of dollars for each book they read and understood worked. Those seven-year-olds ended up roughly two and a half months ahead in reading.

The difference was what got rewarded. Paying for a result a child cannot really control, a test score, is just pressure by another name. Paying for a concrete action they can choose, opening a book, can get them over the first hump. The risk is the felt-tip risk: that when the money stops, the reading stops too. Fryer's bet was to reward the simple action for long enough that the child discovers the book was worth reading anyway.

That is probably the line to hold on to. A reward can be a bridge to something. It makes a poor destination. If a sticker gets a nervous child to try the reading they are frightened of, and the reading itself turns out to be the good part, the sticker has done its job and can quietly retire.

Watch for the moment the chart stops being a helping hand and becomes the whole point, the child who asks "what do I get?" before they will lift a finger. That is the felt-tip effect arriving at your own kitchen table. The reassuring part is that the instinct it feeds on, the pull towards a thing done simply because doing it feels good, was there first. Most of the time, our job is not to add fuel to it. It is to avoid drowning it out.