can it be diagnosed?
It can olny be diagnosed by a psychiatrist and any assessment must include a comprehensive evaluation of the child's individual and family history.
Reactive attachment disorder
 only a psychiatrist can diagnose an attachment disorder and that any assessment must include a comprehensive evaluation of the child's individual and family history.
what is reactive attachment disorder? It is a severe and relatively uncommon disorder that can affect children. what causes it? It is based on a problematic history of care and social relationships.
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Reactive attachment disorder [SEP] Diagnosis
Their practice parameter states that the assessment of reactive attachment disorder requires evidence directly obtained from serial observations of the child interacting with his or her primary caregivers and history (as available) of the child's patterns of attachment behavior with these caregivers. It also requires observations of the child's behavior with unfamiliar adults and a comprehensive history of the child's early caregiving environment including, for example, pediatricians, teachers, or caseworkers. In the US, initial evaluations may be conducted by psychologists, psychiatrists, Licensed Marriage and Family Therapists, Licensed Professional Counselors, specialist Licensed Clinical Social Workers or psychiatric nurses. In the UK, the British Association for Adoption and Fostering (BAAF) advise that only a psychiatrist can diagnose an attachment disorder and that any assessment must include a comprehensive evaluation of the child's individual and family history.