The latest study on America's state of mind is in, and it reveals a concerning rise in the share of adults who say they have problems with memory , decision-making, or concentration – known collectively as cognitive disability.

A US team led by University of Utah neurology researcher Ka-Ho Wong found that those aged 18–39 experienced the biggest uptick in cognitive disability in the past decade, after analyzing survey data from more than 4.5 million people.

Overall, the proportion of US adults reporting serious cognitive difficulties rose from 5.3 percent to 7.4 percent between 2013 and 2023. For those under 40, the rate nearly doubled, jumping from 5.1 percent to 9.7 percent across the same period. People who reported depression were excluded from the figures.

"Challenges with me

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