Psychologist vs. Psychiatrist?

The word psyche comes from the ancient Greek for soul or butterfly (both are very light). Mental health is very important but there are many options so let's see how compate Psychologist and Psychiatrist:

image:most common words associated

 
Psychiatrists are trained medical doctors, they can prescribe medications, and they spend much of their time with patients on medication management as a course of treatment. Psychosis like depression will be best treated by psychiatrist.

Psychologists focus extensively on psychotherapy and treating emotional and mental suffering in patients with behavioral intervention. Psychologists are also qualified to conduct psychological testing, which is critical in assessing a person's mental state and determining the most effective course of treatment.

Therapist would work in group sessions where issues are presented and discussed among patients, while therapist moderate discussion (i.e alcohol addiction)