Introvertness

• They are very, very good at entertaining themselves for long periods.
• Seems exhausted after parties or social gatherings. Needs down time.
• They have one or two close friends and don’t feel the need for more.
• You have to pry information out of them, such as how their day was or if they had a good time at their friend’s house.
• They have a very highly developed sense of personal space and are disturbed when it is not respected.
• They are a very private person.
• They do not like to have to participate in classroom discussions or be called upon for an answer.
• Hate making mistakes in public.
• Enjoys their own company.
• Does not understand the need for small talk.
• Tires easily in large groups or crowds.
• Tends to withdraw from large social gatherings.

http://www.wired.com/geekmom/2011/04/are-you-raising-an-introvert/