Carl Jung classified individuals into introverts and extroverts, based on the characteristics exhibited by them.
Characteristics of extroverts are:
1. Extroverts depend on external stimulation and evaluate themselves based on impressions of others
2. they tend to be outgoing, cheerful, optimistic
3. they choose careers and hobbies that bring them in contact with others.
4. they tend to be enthusiastic, and full of energy.
