Why the Brightest Children Rarely Grow into the Brightest Adults

Novak Djokovic first picked up a racket at four, left Serbia for a German tennis academy at twelve, and lifted his first Grand Slam at twenty. He now has 24 majors under his belt and has spent more weeks at world number one than any rival. His illustrious arc seems to confirm a tidy story: identify a child prodigy, drill the talent early, and watch the trophies follow.

A paper published in Science late last year, however, suggests that Djokovic is closer to the exception than the rule. Across more than 34,000 elite performers in sport, chess, classical music and academia, the most heavily drilled teenagers usually did not become the world's true superstars. Those who did make that grade had often been quietly unremarkable in adolescence — late to peak, slow to specialise, and stubbornly broad in their interests for longer than their peers.

The lead author, Arne Güllich of RPTU University Kaiserslautern-Landau, is a sports scientist, and the choice of field is no accident. Sport is a convenient laboratory: performance is measurable, and well-funded youth academies operate on a familiar piece of received wisdom — find the gifted child early, and grind the talent into shape. Yet much of the evidence behind that approach had stopped at school or university level. It had never followed its subjects into adult careers.

Recent studies that did follow them through pointed the other way, and Dr Güllich's team was jolted into action by the inconsistency. They extended the analysis beyond the playing field. Chess proved the simplest endeavour, since national and international federations already maintain an Elo rating for every serious player. Academics could be ranked through citation databases and major prizes such as the Nobels and the Fields medal. Music was trickier; the team leant on a University of California, Davis project that ranked composers by encyclopaedia mentions and opera-house programming.

When the data settled, a striking pattern emerged in every discipline: the elite young and the elite old were almost entirely different people. Roughly nine in ten adult superstars had not been standout children, while only one in ten of those celebrated children went on to make it big. The adults who eventually rose to the top had pursued multiple sports — or instruments, or research questions — for years longer than their more focused confrères. Their early results lagged. But once they did commit, they improved at remarkable speed: better training efficiency, in the trade's own jargon. Nobel-prizewinning scientists, similarly, had won fewer scholarships and reached senior posts later than near-miss nominees.

Why the pattern recurs is harder to settle. Existing theories of expertise, the authors note, fit the data poorly, so they had a stab at it with three of their own. The first borrows from labour-market economics and is called search and match: a wider sample of activities raises the chance of landing on the one that truly suits a young person's aptitudes. Rafael Nadal, after all, flirted with a football career before plumping for tennis.

The second proposal, enhanced learning, treats learning itself as a transferable skill: practising a variety of pursuits sharpens the cognitive machinery, so that focused training, when it eventually comes, bites harder. The third — the limited-risk hypothesis — is plainer still. Avoiding the hothouse, at least for a while, may stop talented youngsters from burning out, growing disenchanted with relentless practice, or simply turning bored after years of monomania.

Dr Güllich is careful not to overstate the case. The hothouse model, he insists, is not broken; it reliably produces highly competent performers. It just rarely produces the truly world-class ones. For sports academies, selective schools and high-end conservatoires, that is an uncomfortable distinction worth sitting with — and perhaps redesigning around.