A unique and long-term pattern of inner experience and outward behavior
Personality tends to be consistent and is often described in terms of "traits"
Personality is also flexible, allowing us to learn and adapt to new environments
For those with personality disorders, however, that flexibility is usually missing
Personality disorder
An enduring, rigid pattern of inner experience and outward behavior that impairs sense of self, emotional experience, goals, and capacity for empathy and/or intimacy
The rigid traits of people with personality disorders often lead to psychological pain for the individual or others
A personality disorder typically becomes recognizable in adolescence or early adulthood and symptoms last for years
Personality disorders are among the most difficult psychological disorders to treat
Many sufferers are not even aware of their personality disorder (or do not realize their responsibility in the matter)
It has been estimated that 9% to 13% of all adults may have a personality disorder
It is common for a person with a personality disorder to also suffer from another disorder, a relationship called comorbidity
The presence of a personality disorder complicates a person's chances for a successful recovery from other psychological problems
Clusters of personality disorders in the DSM-5
Odd or eccentric behavior
Dramatic, emotional, or erratic behavior
Anxious or fearful behavior
Categorical approach
Assumes that problematic personality traits are either present or absent, and a personality disorder is either displayed or not
The symptom of the personality disorders overlap each other so much that it can be difficult to distinguish one from another
Diagnosticians sometimes determine that particular individuals have more than one personality disorder
The lack of agreement has raised concerns about the validity (accuracy) and reliability (consistency) of these categories
Dimensional approach
Personality disorders differ more in degree than in type of dysfunction, with each trait varying along a continuum extending from nonproblematic to extremely problematic
The framers of DSM-5 initially proposed a dimensional approach, but this was met with enormous concern and criticism in the clinical field, leading to a reversion back to the categorical approach
Odd personality disorders
Paranoid personality disorder
Schizoid personality disorder
Schizotypal personality disorder
People with odd personality disorders display behaviors similar to, but not as extensive as, schizophrenia
Clinicians have learned much about the symptoms of odd personality disorders, but little of their causes or how to treat them
People with odd personality disorders rarely seek treatment
Paranoid personality disorder
Characterized by deep distrust and suspicion of others, although the suspicion is usually not "delusional"
People with paranoid personality disorder are critical of weakness and fault in others, unable to recognize their own mistakes, extremely sensitive to criticism, and repeatedly bear grudges
Between 0.5% and 3% of adults are believed to experience paranoid personality disorder, apparently more men than women
Proposed explanations for paranoid personality disorder
Psychodynamic: early interactions with demanding parents
Cognitive: maladaptive assumptions like "People are evil and will attack you if given the chance"
Biological: genetic causes
People with paranoid personality disorder do not typically see themselves as needing help and few come to treatment willingly
Therapy for paranoid personality disorder, as for most other personality disorders, has limited effect and moves slowly
Schizoid personality disorder
Characterized by persistent avoidance of social relationships and limited emotional expression
People with schizoid personality disorder do not have close ties with other people and genuinely prefer to be alone
Schizoid personality disorder is estimated to affect fewer than 1% of the population and is slightly more likely to occur in men than in women
Proposed explanations for schizoid personality disorder
Psychodynamic: unsatisfied need for human contact, parents were unaccepting or abusive
Cognitive: deficiencies in thinking, unable to pick up on emotional cues
People with schizoid personality disorder remain emotionally distant from the therapist, seem not to care about treatment, and make limited progress
Schizotypal personality disorder
Characterized by a range of interpersonal problems, marked by extreme discomfort in close relationships, odd (even bizarre) ways of thinking, and behavioral eccentricities
People with schizotypal personality disorder tend to drift aimlessly and lead an idle, unproductive life, choosing undemanding jobs in which they are not required to interact with other people
It has been estimated that 2% to 4% of all people (slightly more males than females) may have schizotypal personality disorder
Proposed explanations for schizotypal personality disorder
Similar factors to schizophrenia, including family conflicts, psychological disorders in parents, and biological factors like high dopamine activity
Linked to mood disorders, especially depression
Therapy is as difficult in cases of schizotypal personality disorder as in cases of paranoid and schizoid personality disorders