Heritability of Psychological Traits and Developmental Milestones in Infancy: A Systematic Review and Meta-analysis.

ABSTRACT:

Importance

Although infancy is the most rapid period of postnatal growth and development, factors associated with variation in infant traits are not well understood.

Objective

To synthesize the large twin study literature partitioning phenotypic variance in psychological traits and developmental milestones in infancy into estimates of heritability and shared and nonshared environment.

Data sources

PubMed, PsycINFO, and references of included publications were searched up to February 11, 2021.

Study selection

Peer-reviewed publications using the classical twin design to study psychological traits and developmental milestones from birth to 2 years old were included.

Data extraction and synthesis

Data were extracted in line with Preferred Reporting Items fo

SUBMITTER: Austerberry C 

PROVIDER: S-EPMC9396365 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature