Attachment theory describes the bonds between caregivers and children that serve a protective function for children.
The FR theory developed by Main and Hesse (1990) proposes that unmonitored parental behaviour, or frightened, frightening and dissociative (FR) behaviour, stemming from a history of Unresolved/disoriented (U/d) trauma, disorganizes the attachment relationship.
The parent is a source of fear and is thus unavailable as a source of safety and protection