The Sibling Who Usually Becomes The Parent's Favorite, According To Research

Research reveals this sibling often wins the most attention from Mom and Dad.

Last updated on May 15, 2025

Sibling that is the parental favorite. Elina Fairytale | Pexels
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Your little sister, the family's baby, has always gotten away with everything. If you brought home a D on your report card, you were punished, but if she did the same, she only got a stern, "Please do better next time."

Then there's your older sister with her athletic trophies. Your parents certainly loved (and still love) bragging about her. And don't forget your brother, the scholastically gifted middle child. Did your parents have to frame every single one of his awards?

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There's so much competition for parents' attention, it stands to reason that mothers and fathers must have a favorite child, even if they don't want to admit it, right?

Unfortunately, you'll probably never know for sure which child is your parents' favorite, as they will continually insist that they love all of their children the same amount and in the same way. But as much as parents want people (especially their children) to think that they don't have a favorite, science says something entirely different.

According to research, the sibling who usually becomes the parents' favorite is unclear, but firstborn children tend to think they're the favorite anyway.

Siblings rival for parental favor ESB Professional via Shutterstock

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In other words, research has found that yes, the vast majority of parents have favorites.  Which means yours probably do, too. And their favorite is often based on birth order

A recently resurfaced study by sociologist Katherine Conger found that 74% of mothers and 70% of fathers reported preferential treatment toward one child.

Conger and her research team surveyed 384 sibling pairs (each within four years of their sibling) and asked them how they felt their parents treated them, if they sensed some sort of differential treatment, and if they felt a positive or negative reaction from the perceived difference.

RELATED: The Personality Trait That’s Basically Your Superpower, Based On Your Birth Order

The research team then interviewed the siblings' parents for their perspectives as well. Although the parents didn't say which child they preferred, Conger and her team theorized based on which sibling felt the discrepancy the most.

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"Our working hypothesis was that the older, earlier-born child would be more affected by perceptions of differential treatment due to their status as an older child — more power due to age and size, more time with parents — in the family," Conger told Quartz.

However, it turned out their hypothesis was completely wrong.

RELATED: The Strangely Fascinating Way Your Birth Order Affects Your Personality

Parent prefers favorite sibling Fernanda_Reyes via Shutterstock

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Firstborns reported feeling they were the preferred child because, for a glorious time, they were (technically) only children.

Once their siblings started to come along, their status as oldest children made them the first in the family to excel at sports, lead the way academically, and generally challenge their parents' parenting skills.

Eldest children pave the way, and when those younger kids get to the age of their older siblings, their parents have a better idea of how to handle certain situations and tend to get a little tougher.

Because of this, younger siblings often believe they can sense the firstborn bias, and it affects their self-esteem. The research also found, birth order didn't matter in some ways, as each child was suspicious of their parents liking their siblings more.

"Everyone feels their brother or sister is getting a better deal," Conger said. To sum it all up, since you'll probably never know for sure which child in your family is your parents' favorite, you might as well go on believing it's you.

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Christine Schoenwald is a writer, performer, and astrology lover. She's had articles in The Los Angeles Times, Salon, and Woman's Day.

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