I need to make an appointment with a doctor for depression & eating disorder. From which specialities (Psychiatry or Psychology) should I choose a doctor from? What is the difference?

A psychiatrist is a physician who specializes in psychiatry and is certified in treating mental illness.[1] As part of their evaluation of the patient, psychiatrists are one of only a few mental health professionals who may prescribe psychiatric medication, conduct physical examinations, order and interpret laboratory tests and electroencephalograms, and may order brain imaging studies such as computed tomography or computed axial tomography, magnetic resonance imaging, and positron emission tomography scanning.

A psychologist is a scientist and/or clinician who studies psychology, the systematic investigation of the human mind, including behavior and cognition. Psychologists are usually categorized under a number of different fields, the most well-recognized being clinical psychologists, who provide mental health care, and research psychologists, who collect information on people’s minds.