Attachment and Health
John Bowlby and Mary Ainsworth developed attachment theory in the 1960s while investigating the effects of maternal separation on infant development. The development of the Strange Situation task in 1965 by Ainsworth and Wittig allowed researchers to systematically investigate the attachment system operating between children and their parents. The Strange Situation involves separating infant-parent dyads and observing infant behaviours upon reunion. Infant behaviour tended to follow patterns, leading to the development of three attachment categories: Secure, Anxious-Avoidant, and Anxious-Resistant. In 1990, Ainsworth added a new category, championed by Mary Main, called Disorganized/Disoriented attachment, characterized by its less reliable pattern of behaviour.
Social emotional development
Attachment refers to the strong bond that individuals develop with special people in their lives. Though we can have attachment relationships with significant others in adulthood, such as marital partners, most humans’ first and most influential attachment is with their primary caregiver(s) as infants. John Bowlby and Mary Ainsworth first delineated and tested attachment theory as an evolutionarily informed process in which the emotional ties to a caregiver are adaptive for survival. Their research supported the presence of four stages of attachment formation: