What is an introvert? What is an extrovert?
Most basically, these terms refer to where a person gets their energy from; introverts find it energizing to spend large periods of time alone, while extroverts gain energy from spending time with other people. If you like small talk and have a large circle of friends, you probably tend toward the extrovert end of the spectrum. If it’s less painful for you to get a needle at the dentist than it is to chat with other patients in the waiting room, you might be an introvert.
