Developmental psychology
Attachment theory, originally developed by John Bowlby, focuses on the importance of open, intimate, emotionally meaningful relationships. Attachment is described as a biological system or powerful survival impulse that evolved to ensure the survival of the infant. A child who is threatened or stressed will move toward caregivers who create a sense of physical, emotional and psychological safety for the individual. Attachment feeds on body contact and familiarity. Later Mary Ainsworth developed the Strange Situation protocol and the concept of the secure base.
Patricia McKinsey Crittenden
Patricia McKinsey Crittenden (born 1945) is an American psychologist known for her work in the development of attachment theory and science, her work in the field of developmental psychopathology, and for creation of the Dynamic-Maturational Model of Attachment and Adaptation (DMM).