It's hard to make friends, and psychology helps explain why. Learners examine a case study where a new member to a club is looking to form friendships. What helps and what can get in the way? A second question asks scholars to examine...

Today, thanks to better early detection, there are 63% fewer deaths from heart disease than there were just a few decades ago. Thomas Insel, Director of the National Institute of Mental Health, wonders: Could we do the same for...

Explains the many different categories of abnormal behavior, and the subcategories in each group.