  In theory, culture-bound syndromes are those folk illnesses in which alterations of behaviour and experience figure prominently, relative to local norms. Standard DSM diagnoses are not thought of in this way, even if they are culturally limited. Multiple Personality Disorder/ Dissociative Identity Disorder, for example, was widely diagnosed in the USA in the 1980s, but seldom found elsewhere. That did not lead psychiatrists to treat it as a culture-bound syndrome, even though it seems to fit the definition. The assumption in mainstream psychiatry is that Western conditions are not culture-bound; they represent abnormalities in a universal human endowment. This is the case even for conditions (such as some kinds of body dysmorphia) for which prevalence data only exists in a few western nations. 