Failure to function adequately - Unable to cope with daily tasks of living. Eg not conforming to standard interpersonal rules, experiencing severe personal stress, and becoming dangerous to themselves or others
Intellectual Disability Disorder
Individual must also be failing to function adequately for diagnosis
Deviation from ideal mental health - Does not meet criteria for good mental health - Jahoda. (No symptoms, rationality and perceive accurately, ability to self-actualise, coping with stress, good self-esteem, independence etc.)