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.
Such internal working models guide future behavior as they generate expectations of how attachment figures will respond to one's behavior. For example, a parent rejecting the child's need for care conveys that close relationships should be avoided in general, resulting in maladaptive attachment styles.