In 2022, Rafael Nadal approached the baseline and began horizontally abducting his right arm to loft a tennis ball approximately 5 feet. He abruptly contacted the inferolateral aspect of the tennis ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

Learning later in life isn't just possible, it is important for good quality of life. It can boost memory, emotional well-being, and even a sense of purpose. A new study shows that older adults learn ...

This study looks at how national public opinion polling in the United States changed from 2000 to 2022. It focuses on two aspects: the sample source(s) – that is, where the survey takers came from – ...