Final answer:
A therapist who encourages patients to share their nightmares is most likely a psychoanalyst.
Step-by-step explanation:
If a therapist encourages his patients to tell him about a recent nightmare, he is most likely a psychoanalyst. Sigmund Freud, the founder of psychoanalysis, believed that dreams provide important insight into the unconscious mind. Freud used dream analysis as a means to access the unconscious and understand conscious behavior. By encouraging patients to share their nightmares, a therapist can gain valuable information about their unconscious thoughts and emotions.