* A sense of responsibility and the need to be in control.
* A tendency to be perfectionistic and to set high standards for themselves.
* A desire to please others and to be seen as "good".
* A tendency to put the needs of others before their own.
There are no conclusive scientific studies that prove the eldest daughter theory has any credibility. In families with multiple children, each individual tends to develop their unique personality and traits, and birth order does not necessarily determine specific behaviors.
Parenting style, family dynamics, individual experiences, cultural factors, and genetics play significant roles in shaping a person's personality. It is essential to approach the topic of eldest daughter syndrome with caution and understand that it may not apply to all families.