1. Some criteria used for reaching a diagnosis cannot be observed directly

2. Personality disorders can be similar to each other.
3. People with different personalities can be given the same diagnosis
4. Do you think that personality disorders are true mental illnesses? Why or why not?

http://www.mayoclinic.com/health/personality-disorders/DS00562

1. Some criteria used for reaching a diagnosis cannot be observed directly:

To determine a diagnosis, mental health professionals use various assessment tools and criteria. While some symptoms and behaviors can be observed directly, others cannot. For example, thoughts, feelings, and internal experiences cannot be directly observed by others. Therefore, mental health professionals rely on self-reporting from the individual being assessed, as well as information gathered from clinical interviews and psychological testing. These indirect measures help in evaluating symptoms and making a diagnosis.

2. Personality disorders can be similar to each other:
Personality disorders are characterized by enduring patterns of thoughts, feelings, and behaviors that deviate from cultural expectations and cause significant distress or impairment. There are various types of personality disorders, such as borderline personality disorder, narcissistic personality disorder, and antisocial personality disorder, among others. While each type has distinct features, there can be overlaps and similarities between them. This is because personality disorders are based on different combinations and severities of maladaptive personality traits, and some traits may be present across multiple disorders.

3. People with different personalities can be given the same diagnosis:
A diagnosis is made based on the presence of specific criteria outlined in diagnostic manuals like the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). These criteria focus on observable behaviors, thoughts, and feelings, rather than overall personality traits. Therefore, individuals with different personalities can still meet the diagnostic criteria for the same disorder if they exhibit the required symptoms and impairments. It is important to remember that a diagnosis is just one aspect of understanding an individual's mental health and does not define their entire personality or identity.

4. Whether personality disorders are considered true mental illnesses is a matter of debate among professionals. There are different perspectives on this issue. Some argue that personality disorders are indeed mental illnesses because they involve significant distress, impairment, and dysfunction in individuals' lives. Others believe that personality disorders are better understood as variations in personality styles rather than pathological conditions. This viewpoint suggests that people with personality disorders may have unique strengths and weaknesses instead of being inherently "ill." Ultimately, the classification and understanding of personality disorders continue to evolve as research and clinical knowledge in the field of psychology advances.