The Marshall Project found more than 70,000 cases referred to law enforcement over allegations of substance use during ...

Bayes' theorem is a statistical formula used to calculate conditional probability. Learn how it works, how to calculate it ...

Personality tests are a tool for insight, but they can also limit your potential. Learn why your results aren’t a ceiling and how personality can change.

Lipoprotein (a) is a low-density lipoprotein that transports cholesterol in the blood. The lipoprotein (a) test — or Lp(a) test — determines the level of this lipoprotein in the blood, and its results ...

Testing for meningitis may include a physical exam, blood tests, bacterial cultures, imaging, and a spinal tap for cerebrospinal fluid testing to confirm the diagnosis. Seek emergency care for severe ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

Indicator species are living organisms that tell us that something has changed or is going to change in their environment. They can be easily observed, and studying them is considered a cost-effective ...

Most people believe Americans have a civic responsibility to be informed when they vote. But far fewer say regularly following news is extremely or very important. Fresh data delivered Saturday ...