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.
Health realization
Health realization (HR) is a resiliency approach to personal and community psychology first developed in the 1980s by Roger C. Mills and George Pransky, and based on ideas and insights these psychologists elaborated from attending the lectures of philosopher and author Sydney Banks. HR first became known for its application in economically and socially marginalized communities living in highly stressful circumstances (see "Community Applications" below).