Wednesday, 29 Apr, 2009 Science

Second-born Children are More Disobedient, Scientists Confirm


One of the latest researches carried out by scientists from the Pennsylvania State University, the University of Hawaii at Manoa and Purdue University shows that second-born children are more likely to be disobedient later in life than their older brothers and sisters.

Researchers discovered that the majority of firstborn children are likely to be traditional while their younger siblings tend to be more independent.

This study and its results were published in the journal Child Development. It once again proves that birth order has a very important role in creating a child's personality. Researchers based their study on profiles of 364 children in the United States aged between 7 and 19 and their parents. The study also focuses on the way boys start off with similar character to girls but during their early teens become less sensitive.

In addition, scientists took saliva samples in order to estimate the levels of testosterone and asked the participants to keep a driary about everything the do outside school.

"Second-born children showed increases in traits like adventurousness and independence across adolescence, whereas in firstborns, these traits did not change much over time. These findings are consistent with the idea that firstborns conform more, while second-borns are more likely to rebel," said a spokesman of the scientific group.

In their study researchers also noticed that girls who like to play with girls become more feminine later in life while boys become more masculine when they play with other boys. At the same time both boys and girls benefit a lot from having female friends, developing a more adventurous and independent personality.

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