Insecure mental representations of attachment, a nearly invariant feature of cluster B personality disorders, have never previously been studied in twins. We conducted the Adult Attachment Interview (AAI) on 33 pairs of monozygotic (MZ) female twins reared together as an initial exploration of causal influences on mental representations of…

Work in developmental psychiatry and psychology has increasingly focused on how internal representations of early experiences with primary figures of childhood affect relationship formation in later childhood and adulthood. Investigations of the reflective self function, which involves mental states in which individuals become the subject of their…