Sisters protect siblings from depression, study shows

Aug 02, 2010
Something about having a sister -- even a little sister -- makes 10- to 14-year-olds a bit less likely to feel down in the dumps according to research by Brigham Young University. Credit: Mark Philbrick/BYU

Something about having a sister - even a little sister - makes 10- to 14-year-olds a bit less likely to feel down in the dumps.

That's one of several intriguing findings from a new study on the impact have on one another. Brigham Young University professor Laura Padilla-Walker is the lead author on the research, which also sorts out the influence of siblings and the influence of within families.

"Even after you account for parents' influence, siblings do matter in unique ways," said Padilla-Walker, who teaches in BYU's School of Family Life. "They give kids something that parents don't."

Padilla-Walker's research stems from BYU's Flourishing Families Project and will appear in the August issue of the Journal of . The study included 395 families with more than one child, at least one of whom was an adolescent between 10 and 14 years old. The researchers gathered a wealth of information about each family's dynamic, then followed up one year later. Statistical analyses showed that having a sister protected from feeling lonely, unloved, guilty, self-conscious and fearful. It didn't matter whether the sister was younger or older, or how far apart the siblings were agewise.

Brothers mattered, too. The study found that having a loving sibling of either gender promoted good deeds, such as helping a neighbor or watching out for other kids at school. In fact, loving siblings fostered charitable attitudes more than loving parents did. The relationship between sibling affection and good deeds was twice as strong as that between parenting and good deeds.

"For parents of younger kids, the message is to encourage sibling affection," said Padilla-Walker. "Once they get to adolescence, it's going to be a big protective factor."

Many parents justifiably worry about the seemingly endless fighting between siblings. The study found hostility was indeed associated with greater risk of delinquency. Yet Padilla-Walker also sees a silver lining in the data: The fights give children a chance to learn how to make up and to regain control of their emotions, skills that come in handy down the road.

"An absence of affection seems to be a bigger problem than high levels of conflict," Padilla-Walker said.

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