this may not be an entirely satisfactory approach because it is difficult to assess distress
however, the definition acknowledges that the experience of the patient and/or others is important. it captures the experience of many people who need help and is useful for assessing abnormality
counter
some ‘maladaptive’ behaviour may in fact be adaptive
for example, a person who has the obsessive-compulsive disorder of hand washing may find that the behaviour makes him cheerful, happy and better able to cope with his day. thus such behaviour is rewarding and quite functional
i&d
cultural relativity means that it can be difficult to assess adequate functioning as these are linked to cultural ideas of how a person should live their life, therefore different diagnoses will be applied to people in different cultures