The oldest child in a family is usually under more pressure, making them more anxious and serious. Parents usually look up to them to take care of their younger siblings, making them more responsible. When the second child is born, parents attention shifts to them, making the oldest child independent.
Dr. Pratt observes, “Birth order is not a great determinant of personality. The family dynamics at the time of birth and after that are more likely to affect a child’s personality. The environment in which the child grows up allows them to develop and define their personality.”