A surprising new study — or unsurprising, depending on who you are — suggests that the middle child takes the cake when it comes to certain personality traits. There's no denying that birth order ...

A research study on siblings and alcoholic use disorder, The Development Unfolding of Sibling Influences on Alcohol Use Over Time, is worth noting. The researchers, who included professors and a ...

WASHINGTON — People who grow up with lots of siblings are more likely to marry — and to stay married — than are only children or those who grew up with one or two siblings, a new study has found.

Feel like your parents always favored your older sibling? They might have benefited from that more than you realize. A new study suggests all that extra attention makes first-born children smarter ...

A new study published in PLOS Mental Health has explored whether having a sibling born preterm (before 37 weeks of gestation) affects the behavior of children born at term. In a study by the ...

OSLO, Norway - First born children in Norway get better education and as adults are more successful in the job market than younger siblings, a Norwegian-U.S. study showed. "It is the birth order and ...

Feel like your parents always favored your older sibling? They might have benefited from that more than you realize. A new study suggest all that extra attention makes first-born children smarter than ...