Early mastery motivation as a predictor of executive function in young adults with developmental disabilities.

Penny et al. (2014) followed kids with Down syndrome and other delays for twenty years.

They looked at how long the kids kept trying simple puzzles when they were little.

Later they tested the same people on a quick thinking task when they were adults.

Adults who had kept trying the puzzles as kids answered faster and made fewer mistakes.

Early stick-with-it skills predicted better brain control two decades later.

Perez et al. (2015) also ran a long study. They saw that working memory and fine motor skills at six years predicted math at eight years in kids with cerebral palsy.

Schaadt et al. (2015) found a darker link: babies who later had writing problems already showed weaker sound skills at five months.

All three studies agree—tiny early skills echo for years, but each paper spots a different skill window.

You can’t change genes, but you can build persistence. When you see a toddler keep pushing a shape into a sorter, praise the effort, not the result. Add short mastery games to early ABA sessions. Track how long the child stays with the task. That simple note may tell you more about adult independence than any IQ score.