Ask around and almost everyone knows one: the oldest sister who managed the family calendar, translated for a parent, or started cooking dinner for younger siblings before she was old enough to drive. That pattern now has something closer to a research paper trail behind it. In a study of 218 young adults published in the Journal of Child and Family Studies, researchers found that people who felt their childhood caretaking role had real value scored measurably higher on self-esteem as adults — but the effect held together only when their relationship with the siblings they’d helped raise stayed strong. It’s one of the first times the internet-famous idea of “eldest daughter syndrome” has been tested with an actual statistical model instead of a hashtag.
The Study That Measured It
The research, led by psychologist Judyta Borchet and colleagues, surveyed 218 young adults (86.2 percent of them women, average age about 21) using a validated parentification inventory, a sibling-relationship questionnaire, and the Rosenberg Self-Esteem Scale. Using structural equation modeling, the team found that perceived benefits of parentification were positively linked to self-esteem (B = 0.272, p < .001) — and that the quality of the sibling relationship partially explained why. In plain terms: kids who took on early caregiving responsibilities didn’t automatically end up worse off. What mattered was whether that caregiving translated into a genuinely close bond with the siblings they were looking after.
What “Parentification” Looks Like Up Close
A smaller but more granular 2024 study in the Psychology of Woman Journal interviewed 21 girls, ages 13 to 18, growing up in single-parent households, and found the pattern cuts both ways. Researchers identified consistent themes of emotional maturity, resilience, and independence alongside equally consistent themes of emotional burden, social isolation, and academic strain — with the presence or absence of outside social support acting as the deciding factor in which way a given girl’s experience tilted. It’s a small, qualitative sample, but it captures something a national statistic can’t: the same responsibility that builds someone’s competence can also be quietly grinding her down, sometimes in the same year.
Firstborn Daughters, Specifically
A 2024 University of South Dakota thesis by Isabella Ciarico went further, interviewing 10 women ages 18 to 62 who all identified as the oldest daughter in their family, according to the published thesis. Recurring themes included early caregiving duties like managing siblings’ schedules and household finances, a persistent drive toward perfectionism paired with childhood anxiety, a specific grief for a childhood that got cut short, and a caretaking fatigue that many said never fully lifted, even decades later. Tellingly, three of the ten women were outliers who reported little to no parentification — and all three came from households the researcher described as emotionally stable and free of major financial or health crises, suggesting the pattern isn’t really about birth order alone. It’s about what a family needed from its oldest daughter when things got hard.
Why the Framing Matters
Taken together, these three studies point to something more specific than a vibe. Parentification is a real, measurable construct — not unique to eldest daughters, but disproportionately landing on them because of how families tend to assign caregiving roles along gender and birth-order lines. And its effects aren’t uniformly bad: the same women describing chronic fatigue and lost childhoods also describe real resilience and competence that followed them into adulthood. What separates a “positive” outcome from a genuinely harmful one, across all three studies, isn’t whether a girl helped raise her siblings. It’s whether that help came with support, whether the sibling bond it built stayed warm rather than resentful, and whether the household around her was stable enough that her caregiving was a contribution rather than a substitute for a missing adult. That’s a more useful, and more testable, question than whether “eldest daughter syndrome” is real. Increasingly, the research says: it depends what else was going on in the house.
