A Kid’s Aggressive Behaviour May Depend on His Siblings

Could it be true, that a kid's behavior may depend on his siblings? A study conducted on 451 families in the U.S. with two kids says so.
A child will either grow up quarrelsome or gentle depends on the sex of his or her sibling. The study says that kids who grew up with an older brother are relatively more aggressive that those who grew up with an older sister. However, a younger sister would reduce the aggressiveness of the first born.
Do you agree?
October 13th, 2007 at 8:59 pm
I do not agree… My middle child who is 2 1/2 is the most aggressive child I have ever seen and my oldest is a girl. She is 5… they are very close and love each other dearly but he does nothing but tries to terrorize her all day long! So, I do not agree and if anyone has tips on how to deal with sibling rivalry, please let me know. I also have a one yr. old son and I am praying he does not turn out aggressive by watching his brother!