Albert Ellis, American psychologist and author (died 2007)

Albert Ellis was an American psychologist and psychotherapist who founded rational emotive behavior therapy (REBT). He held MA and PhD degrees in clinical psychology from Columbia University, and was certified by the American Board of Professional Psychology (ABPP). He also founded, and was the President of, the New York City-based Albert Ellis Institute. He is generally considered to be one of the originators of the cognitive revolutionary paradigm shift in psychotherapy and an early proponent and developer of cognitive-behavioral therapies.

September 27 is the 270th day of the year in the Gregorian calendar; 95 days remain until the end of the year.