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.
Dependency need
Dependency needs can sometimes be associated with Attachment Theory. Attachment can be defined as a "deep and enduring emotional bond that connects one person to another across time and space." (Ainsworth, 1973; Bowlby, 1969) Attachment is thought to first occur between an infant and his or her primary caregiver. (Hetherington & Parke, 1999) Harry Harlow and his research in developmental psychology showed that attachment between infant and caregiver is vitally important to the psychological development of the infant and requires physical contact with a warm and responsive mother. (Larsen & Buss, 2008) These early experiences and reactions of the infants to the primary caregivers become working models for later adult relationships. (Larsen & Buss, 2008) Therefore, conclusions can be visibly drawn linking attachment and dependency need; vital, infantile needs for mothering, love, affection, shelter, protection, security, food, and warmth (dependency need) can stem from the type of interaction between that of an infant and his or her primary caregiver. Three different types of attachment styles, securely attached, avoidantly attached, and ambivalent attached, can result from varying levels and styles of care a primary caregiver provides an infant.