President Donald Trump claims he aced his third cognitive test and questions whether former Vice President Kamala Harris, Minnesota Gov. Tim Walz could pass similar exams.

Welcome back! For Day 4 of the challenge, let’s do a short and fun activity based around a concept called cognitive reserve. Decades of research show that people who have more years of education, more cognitively demanding jobs or more mentally stimulating hobbies all tend to have a reduced risk of cognitive impairment as they get older.

President Donald Trump weighed in on the conversation about his health on Jan. 2, saying his doctors have 'just reported' that he nailed a third cognitive test — though he'd already talked about takin

Donald Trump gloated about taking his cognitive tests at a recent press conference, saying that all presidents and vice presidents should take them before going into office. On January 6, the 79-year-old politician spoke about how he aced his third test — and is as mentally fit to rule the country.

Researchers at UConn and the University of Minnesota have discovered that there may be more to the "summer slide" phenomenon following a break in schooling than just forgetting material. In fact, the researchers found reliable patterns of seasonal variation in performance on laboratory tests assessing more general cognitive abilities like executive functioning,

President Trump addresses ongoing health scrutiny amid reports of hearing issues and questions about medical imaging that sparked widespread speculation.

The late-night host scored a perfect 30/30 on the Montreal Cognitive Assessment during a segment titled "Is Jimmy Kimmel a moron?"

Just last month, Trump announced that he recently passed a “third” cognitive test. This led social media users on Friday to question why the president is announcing his results again, with pundits pointing out that Trump made an identical claim last month.

An international working group of canine cognition experts has released a set of guidelines for veterinarians to use in diagnosing and monitoring canine cognitive dysfunction syndrome (CCDS), or canine dementia.

Late-night hosts are weighing in after a 37-year-old woman was fatally shot by an immigration agent in Minneapolis.