introvert - n. a quiet person who does not find it easy to talk to other people
shy - adj. feeling nervous and uncomfortable about meeting and talking to people
extrovert - n. a friendly person who likes being with and talking to other people: an outgoing person
stimulation - n. something that excites activity or growth
gregarious - adj. enjoying the company of other people
autonomously - adv. independently; separately
temperament - n. the usual attitude, mood, or behavior of a person or animal
spectrum - n. a complete range of different opinions, people, etc.