A recent study has deemed that girls and boys are not as different as previously thought.
The research suggested that although girls tend to hang out in smaller, more intimate groups than boys, this difference is diluted by the time children reach the eighth grade.
"Girls and boys aren't as different as we think they are," said Jennifer Watling Neal, of Michigan State University.
Because children's peer-group structure can promote negative behaviors like bullying and positive behaviors like helping others, she said it's important for researchers to have a clear picture of what these peer groups look like.
"Although we tend to think that girls' and boys' peer groups are structured differently, these differences disappear as children get older," Neal said.
The reason may have to do with an increased interaction with the opposite sex.
"Younger boys and girls tend to play in same-sex peer groups," Neal said. "But every parent can relate to that moment when their son or daughter suddenly takes an interest, whether social or romantic, in the opposite sex."
Neal examined peer relationships of third- through eighth-grade students at a Chicago school and found that girls in the younger grades did, indeed, tend to flock together in smaller, more intimate groups than boys.
But that difference disappeared by the eighth grade. While the size of boys' peer groups remained relatively stable, girls' peer groups became progressively larger in later grades.
The findings appeared in the Journal of Social and Personal Relationships.