A psychologist is a professional that engages in assessment, diagnosis, and treatment of mental health to improve the functioning of individuals. In Ontario, only psychologists who are registered by their regulatory body, The College of Psychologists of Ontario, can call themselves a psychologist. This provides protection to the public in terms of ensuring a high standard of training and care. In order to be registered with the CPO, psychologists need to complete a doctorate degree (Ph.D.) in psychology as well as one year of supervised internship. In addition, the psychologist is required to pass various professional exams and agree to follow an ethical code of standards of professional practice as outlined by legislation. For more information, please visit the website for The College of Psychologists or the website for the Ontario Psychological Association.