This document provides an introduction to clinical psychology. It discusses that clinical psychology is devoted to studying, diagnosing, and treating mental illnesses and psychological disorders. The course will cover foundations of clinical psychology, clinical assessment, clinical interventions, and specialties. It also discusses that approximately 30% of American adults have been diagnosed with a psychiatric disorder, including mood disorders, anxiety disorders, schizophrenia, and eating disorders. Clinical psychologists play a key role in treating these mental health problems through assessment, diagnosis, and various psychological treatments.