Diagnostic criteria are specific guidelines used by healthcare professionals to identify and classify medical conditions or mental health disorders. These criteria help ensure that diagnoses are consistent and based on established standards, allowing for effective treatment and management of the condition. In the field of psychology, for example, the Diagnostic and Statistical Manual of Mental Disorders (DSM) provides a comprehensive set of criteria for diagnosing various mental health issues. By following these criteria, clinicians can accurately assess symptoms and determine the appropriate interventions for their patients.