There has been much talk about the cognitive abilities of Trump as he has struggled recently to speak clearly at press conferences and has spent many hours posting on social media late at night. The ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Pew Research Center sometimes employs cognitive interviewing to help improve ...

With Cleo Smith safely returned to her family, and charges laid against her alleged abductor, much of the media’s focus has now turned to the question of how police can best piece together the details ...

The president again tried to defend his own mental fitness for office — and disparage Joe Biden’s — by frequently repeating a memory sequence: “Person. Woman. Man. Camera. TV.” By Katie Rogers ...