P- one strength of deviation from social norms is that it is used in clinical practice
EX- for example, key characteristics of antisocial personality disorder is the failure to conform to culturally normal ethical behaviour e.g. recklessness, aggression, violating and deceitfulness.
E- those signs of the disorder is all deviation from social norms. such norms also play a part in the diagnosis of schizotypal personality disorder, where the term 'strange' is used to characterise the thinking, behaviour and appearance of people with the disorder
L- this shows that the deviation from social norms criterion has value in psychiatry