Internal working model of attachment
Internal working model of attachment is a psychological approach that attempts to describe the development of mental representations, specifically the worthiness of the self and expectations of others' reactions to the self. This model is a result of interactions with primary caregivers which become internalized, and is therefore an automatic process. John Bowlby implemented this model in his attachment theory in order to explain how infants act in accordance with these mental representations. It is an important aspect of general attachment theory.
Attachment theory
Attachment theory is a psychological model attempting to describe the dynamics of long-term and short-term interpersonal relationships between humans. "Attachment theory is not formulated as a general theory of relationships; it addresses only a specific facet": how human beings respond in relationships when hurt, separated from loved ones, or perceiving a threat.