Many studies have documented the gradual deterioration of cognitive skills over time.
But in this study, published in the journal PLOS One, the drop, albeit small, was detected first among 24 year olds.
In fact, for every 15 years after age 24, cognitive speed dropped by about 15%.
And the results could not be explained by the fact that the players were getting better at navigating the game over time; the age-related decline remained, even among those with more skill playing the game.
Our Brains Begin to Slow Down at Age 24
Alice Park, TIME