The Psychiatric Evaluation and Evidence-Based Rating Scales. Assessment tools have two primary purposes: 1) to measure illness and diagnose clients, and 2) to measure a client’s response to treatment. Often, you will find that multiple assessment tools are designed to measure the same condition or response. Not all tools, however, are appropriate for use in all clinical situations. You must consider the strengths and weaknesses of each tool to select the appropriate assessment tool for your client. For this Discussion, as you examine the assessment tool assigned to you (PTSD Checklist (PCL) by the Course Instructor, consider its use in psychotherapy.  -Review this week’s Learning Resources and reflect on the insights they provide regarding psychiatric assessment and diagnosis. -Consider the elements of the psychiatric interview, history, and examination. -Consider the assessment tool assigned to you by the Course Instructor.

-Write an explanation of three important components of the psychiatric interview and why you consider these elements important. -Explain the psychometric properties of the rating scale you were assigned (PTSD Checklist (PCL)). Explain when it is appropriate to use the rating scale (PTSD Checklist (PCL) with clients during the psychiatric interview and how the scale is helpful to a nurse practitioner’s psychiatric assessment.