The document discusses personality disorders, which are inflexible patterns of behavior and traits that cause difficulties in functioning. It notes that the Canadian diagnostic system identifies 10 types of personality disorders grouped into 3 categories: suspicious, emotional/impulsive, and anxious. Each of the 10 disorders - paranoid, schizoid, schizotypal, antisocial, borderline, histrionic, narcissistic, avoidant, dependent, and obsessive-compulsive personality disorder - is then defined in terms of common traits and behaviors. The document emphasizes that learning about these disorders is important for understanding people with mental health problems and supporting them in personal and professional contexts like social work.