The failure to function adequately definition of abnormality was proposed by Rosenhan and Seligman (1989).
This occurs when the patient does not obey social and interpersonal rules, are in distress or are distressing, and their behaviour has become dangerous.
STRENGTH
It takes into account the patient’s perspective, and so the final diagnosis will be comprised of the patient’s (subjective) self-reported symptoms and the psychiatrist’s objective opinion.
The subjectivity and objectivity needed for a diagnosis may lead to more accurate diagnoses of mental health disorders because such diagnoses are not constrained by statistical limits, as is the case with statistical infrequency.
WEAKNESS
It may lead to the labelling of some patients as ‘strange’ or ‘crazy’, which does little to challenge traditional negative stereotypes
Not everyone with a mental health disorder requires a diagnosis, especially if they have a high quality of life and their illness has little impact upon themselves or others.
Instead, such labelling could lead to discrimination or prejudice faced against them by employers and acquaintances.
It suggests that if a person’s current mental state is preventing them from leading a ‘normal’ life, alongside the associated normal levels of motivation and obedience to social norms, then such individuals may be considered as abnormal.