An astonishing number of things that scientists know about brains and behavior are based on small groups of highly educated, mostly white people between the ages of 18 and 21. In other words, those ...

Perhaps you saw the headlines this weekend: “Sexting: Just About Everyone’s Doing It,” from Discovery News, or “Online survey finds 8 in 10 adults have engaged in sexting,” from CNN. Wow – that’s ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Representative sampling and random sampling ...

Sampling is one of the most important aspects of particle size analysis. If a biased sample is analyzed, a biased particle size distribution will be recorded. The requirement for good sampling not ...