Are you the first child in your family?Second?Third?Are you the only child (no brother or sister)?This birth order is part ofyour evnironment.A new study from Stanford University in California shows us something interesting.Birth order has influence on personality.The oldest(first) child is usually a careful,hard worker and often a leader.The middle child is usually friendly and loves to be with other people.The youngest(last) child likes to create new things.A child without brothers or sisters likes to be with abults,not just children.