Internal Working Model – A mental model of the world which enables individuals to predict and control their environment. Regarding attachment, this relates to the person’s expectations about relationships
An infant learns about relationships from experience with their PCG / monotropic attachment The infant learns what relationships are, and how people in a relationship feel and behave towards each other.
This then forms the expectations and attitudes towards others, both with friendships (childhood) and romantic relationships (adult).
According to the critical period and continuity hypothesis, the IWM does not change throughout life, and is even then passed on to any children.