Psychologist in 1905: Binet builds the first practical intelligence test

What is the difference between a psychologist and a psychiatrist? A psychiatrist is a medical doctor who completed medical school and a psychiatry residency, and treats mental illness primarily with medication. A psychologist holds a graduate degree in psychology — a doctorate in the US and Canada — and treats primarily through talking therapies and psychological assessment. They frequently work together: the psychiatrist manages medication while the psychologist provides the therapy and testing.

Do you need a doctorate to become a psychologist? It depends entirely on the country. The United States and Canada restrict the title to holders of a PhD or PsyD, roughly ten years of study after secondary school. Much of Europe, along with India, South Africa and Australia, registers psychologists at master's level after five to six years plus supervised practice. Everywhere, the title is legally protected and tied to a government or board register.

How long does it take to become a psychologist? In the United States, typically ten to twelve years: a four-year bachelor's degree, five to seven years of doctoral training including a one-year full-time internship, then supervised postdoctoral hours and a licensing exam. In most of Europe and Australia the master's-plus-supervision route takes six to eight years. No serious system licenses anyone without supervised clinical hours.