DSM-IV lists ten different personality disorders. These are grouped into three clusters: odd or eccentric disorders; dramatic, emotional or erratic disorders; and
anxious or fearful disorders. These can be summarised as follows:
1.  Odd or Eccentric Disorders
a) Paranoid personality disorder: This is characterised by irrational suspicions and a deep mistrust of others.
b) Schizoid personality disorder: This is characterised by a lack of interest in other people, and no need or desire for relationships.
c) Schizotypal personality disorder: This is characterised by bizarre thought patterns and behaviours.
2.  Dramatic, Emotional or Erratic Disorders
a) Antisocial personality disorder: This is characterised by a blatant and pervasive disregard for authority, the law and the rights of others.
b) Borderline personality disorder: This is characterised by rigid, categorical and extreme “black and white” thinking. Also, instability in their relationships with others, a poor self-image, low self-esteem, impulsivity and behaviour which results in self-harm.
c) Histrionic personality disorder: This is characterised by attention-seeking behaviour. For example, behaving in ways that are inappropriately seductive, or displaying exaggerated emotions.
d) Narcissistic personality disorder: This is characterised by grandiose claims and behaviours, a need for admiration, and a lack of empathy. This individual also finds it hard to relate in meaningful ways to others.
3.  Anxious or Fearful Disorders
a) Avoidant personality disorder: This is characterised by social inhibition, feelings of inadequacy, extreme sensitivity to negative evaluation, and avoidance of social situations.
b) Dependent personality disorder: This is characterised by an inappropriate psychological dependence on others.
c) Obsessive-compulsive personality disorder (This is different from obsessive-compulsive disorder): It is characterised by rigid conformity to rules and moral codes – with an excessive need for orderliness.