Three very simple questions President Donald Trump had to answer as part of a cognitive test he described as "hard" have been revealed. In the nearly nine months since President Trump took office for ...

This isn’t a real cognitive test, but it should give you an understanding of how simple screenings work. Donald Trump, who is just three years younger than Biden, has yet to offer details on ...

Since President Joe Biden's poor debate performance last month, some Democratic lawmakers and political commentators are calling on him to take a cognitive test to illustrate his mental capacity.

Older adults with mild cognitive impairment and sleep problems who took at least 5,000 IU of vitamin D daily scored more than 13% higher on a cognitive test than those taking none. The preliminary ...