This "diagnosis" covers a very broad range. It includes moderate social anxiety such as feeling uncomfortable making "small talk" at a party. It includes more significant anxiety people feel when having to speak in front of a meeting. It includes “performance anxiety” such as trembling hands when trying to play a tune that's easy when you’re alone or with a few friends. And it includes severe social phobia than can be so intense people are afraid to leave their own house! Research shows that as many as one out of every ten people in the U.S. have some level of this condition.