The DM-ID 2 Workbook was developed as an accompaniment to the second edition of the Diagnostic Manual-Intellectual Disability (DM-ID 2) to provide clinicians with a comprehensive method to make an accurate diagnosis of mental health in individuals who have an intellectual disability (ID). The DM-ID 2 Workbook provides a structured interview format that focuses on identifying observable signs of mental illness, particularly where symptom presentation and diagnostic criteria differ in individuals with ID.