Nonshared Environment

The unique experiences that make people raised in the same family different from each other.

  • Ex’s: Different peer groups, individual experiences at school, different treatment by parents, hobbies, personal illnesses or accidents.
  • Ex: One sister has a teacher who pushes her into debate, and the other has a coach who pushes her into track.
  • Ex: A broken leg at age nine keeps one twin indoors reading for a year while the other plays outside.

Last updated: October 28, 2026 at 9:12 AM