A large-scale longitudinal study offers fresh insight into how early relationships shape our relationships in adulthood.
We often talk about how early life matters for adult functioning. But a recent landmark study has offered robust, longitudinal evidence that the quality of childhood relationships with parents, especially mothers, and with peers, predicts adult attachment orientations in friendships, parental relationships, and romantic partnerships.
The study in brief
Researchers led by Keely Dugan and R. Chris Fraley analysed data from a U.S. cohort of children (n ≈ 1,364) beginning in infancy and followed through adolescence, with a follow-up in early adulthood (n ≈ 705, ages ~26-31) (Dugan et al., 2025). The study published in the Journal of Personality and Social Psychology took both general attachment orientations (anxiety & avoidance) and relationship-specific attachment (with mother, father, best friend, romantic partner) into account.
Key findings
Here are some of the main takeaways:
- The quality of the mother–child relationship during childhood (closeness, low conflict, warmth) emerged as a strong predictor of adult attachment security across relationship domains (parents, best friends, romantic partners).
- Early friendships (peer relationships) were especially predictive of adult attachment orientations in friendships and romantic relationships: growth and depth in peer relationships mattered.
- The father–child relationship showed weaker predictive patterns in this sample — likely because most children reported mothers as primary caregivers in the study’s historical cohort.
- Importantly, these results do not suggest that adult attachment style is fixed. The authors note that attachment security remains malleable, and later life experiences can and do shift patterns.
What this means for clinicians and practitioners
As a clinical psychologist, these implications are meaningful:
- Early relational patterns matter, but they don’t determine destiny. This helps frame “attachment work” as not just about childhood but also engaging present-day relational dynamics and rewiring internal models.
- In therapy , we can emphasise the dual tracks of caregiver/parent-child history and peer/friendship history. The study suggests peer relationships carry unique weight for adult friendships and romantic outcomes.
- Given the study’s findings around mother-child closeness and conflict, assessments of adult clients’ attachment styles could include questions about early maternal relationships and friendship trajectories in childhood/adolescence.
Practical tips for clients to reflect on
- Reflect on early maternal (or primary caregiver) connection: Recall how close you felt to your mother (or primary caregiver) in childhood, how conflict was handled, how available and attuned the caregiver was.
- Explore early friendships: Consider your best childhood/teen friendships. Did they deepen over time? Was there mutual support/give-and-take? These patterns often mirror adult peer and romantic relations.
- Attachment style is fluid: Although early patterns influence adult attachment orientations (anxiety/avoidance), investment in secure relational experiences (therapy, supportive friendships, healthy romantic relationships) can shift the style.
- Design interventions accordingly:
- Building trust and emotional openness (when avoidant)
- Managing reassurance-seeking and fear of abandonment (when anxious)
- Strengthening peer-support networks and forging high-quality friendships as adults
Limitations & caveats
- The sample was ~79% white and non-Hispanic, limiting generalisability to more diverse populations.
- The cohort began in 1991 — father caregiving roles may have shifted since then, possibly underestimating the father–child relationship’s role.
- The study’s effect sizes (R² values) were modest (e.g., ~3% variance explained for general attachment anxiety/avoidance from early mother–child relationship quality) — meaning childhood relationships are one piece of the puzzle, not the whole story.
- While early experiences show strong predictive power, adult experiences (life events, therapeutic interventions, relational changes) continue to matter.
Finally,
This large, longitudinal study offers powerful empirical support for a core tenet of Attachment Theory: that early relationship experiences help shape how individuals approach closeness, dependency, and emotional security in adulthood. But it also nuanced our understanding by showing that both caregiver relationships and peer/friend relationships are important—and that there is hope for change.
References:
Dugan, K., Fraley, R. C., et al. (2025). A prospective longitudinal study of the associations between childhood and adolescent interpersonal experiences and adult attachment orientations. Journal of Personality and Social Psychology.
Nuwer, R. (2025, Nov 1). How Childhood Relationships Affect Your Adult Attachment Style, according to a Large New Study.
