A crying infant quiets when a familiar caregiver picks her up. That rapid calming reflects attachment—the deep emotional bond that forms between child and caregiver and shapes how the child later approaches relationships.

John Bowlby and Mary Ainsworth mapped the patterns: secure attachment grows from consistent, responsive care; insecure forms arise when care is unpredictable, rejecting, or frightening. These early patterns influence adult romantic bonds, friendships, and even workplace behavior. Attachment is not fixed at age two; later relationships can revise internal working models of self and others.

Researchers still use the Strange Situation procedure to classify infant attachment, while adult measures rely on interviews and questionnaires. Therapy that focuses on attachment aims to create a corrective emotional experience within a reliable relationship. The quality of early bonds remains one of the strongest predictors of later emotional regulation and social competence.

A secure base in childhood makes exploration of the wider world feel safer.