You probably understand yourself well enough to know if you are an introvert or extrovert. Yet, how can you tell the difference in others? This is one of the easiest distinctions to recognize in a first meeting, such as an office interview or even a phone interview.
Extroverts are a D-style or I-style DISC personality. An extrovert is a better talker than a listener. They enjoy small talk and social interaction, and feel comfortable around almost anyone. Their body language is typically open and relaxed.
Introverts are an S-style or C-style DISC personality. An introvert is a better listener than a talker. They prefer 1:1 interaction with people they know well. Their body language is typically closed on first meetings.