Use of the strange-situation procedure in the diagnosis of attachment disorder

This study demonstrates the usefulness of developmental theory and research in understanding psychopathological development. It is a case history of a genetically vulnerable 2 1/2 year old child who experienced a major disruption in the attachment process as a function of precipitous and permanent separation from a positive attachment figure and placement in a home in which the new attachment figure was unresponsive to the child. The child's behavior and growth deteriorated requiring her to be hospitalized. Upon admission, she appeared functionally retarded and severely emotionally disturbed. A diagnosis of attachment disorder of infancy was made based upon history, response to treatment, and the use of the strange-situation procedure.