Conducting a variety of psychometric rating scales on subjects with various diagnoses (such as ADHD, Alzheimer's Disease, Bipolar Disorder, GAD, Major Depressive Disorder, Post Traumatic Stress Disorder, Substance Use Disorders, and Schizophrenia/Schizoaffective Disorder) for our clinical trials, in compliance with specific study protocols, FDA, GCP, ICH, and privacy guidelines. The Clinical Rater will be responsible for interviewing research participants and their informants/caregivers, who are being evaluated to participate in a research study for various health conditions, in compliance with study protocol, SOPs, GCP, ICH, and FDA Regulations.