Average stress levels went through the roof during the pandemic. Anxiety, depression, substance abuse, and other mental health problems that skyrocketed after 2

Average stress levels went through the roof during the pandemic. Anxiety, depression, substance abuse, and other mental health problems that skyrocketed after 2020 could easily explain significant concentration and memory problems. Less confounding variables for physical problems, although things like average weight/BMI went way up so physical health factors aren't trivial to detangle either.