# Secure attachment shapes family size

> Secure attachment styles predict fewer children in Canada and US, but not Japan.
- Title: Secure attachment shapes family size · Psychologies | Shortify
- Summary: Secure attachment styles predict fewer children in Canada and US, but not Japan. Secure attachment links to smaller families in North America but not Japan.
- Keywords: secure attachment, insecure attachment, family size, japan, canada, united states, reproductive success, Secure, attachment, shapes, family, size
- Source: Psychologies — https://psychologies.com/famille/enfants/Des-chercheurs-ont-identifie-le-trait-psychologique-qui-influence-en-partie-le-nombre-denfants-que-nous-souhaitons-avoir-633073
- Author: Guillaume Servant
- Published: 2026-09-22T12:06:34+00:00
- Read time: 1 min
- Topics: secure attachment, insecure attachment, family size, japan, canada, united states, reproductive success
## Secure attachment
People with secure attachment styles have fewer children on average than those with insecure styles.

> Essentiellement, les styles d'attachement habituellement qualifiés d'insécurés (c'est-à-dire craintif et préoccupé) étaient liés au fait d'avoir plus d'enfants
## Global study
Researchers analyzed 15,120 adults across Japan, Canada, and the United States.
## North America
In Canada and the US, secure attachment links to smaller families.
## Japan
In Japan, insecure attachment styles correlate with more children.
## Cultural differences
The study shows cultural norms significantly affect how attachment influences family size.
## Key takeaway

Secure attachment links to smaller families in North America but not Japan.