Frederick S. Keller

Frederick Simmons Keller (1899- ) was an American psychologist and educator.

He was a pioneer in experimental psychology. He taught at Columbia University for 26 years and gave his name to the Keller Plan, also known as Personalized System of Instruction an individually paced, mastery-oriented teaching method that has had a significant impact on college-level science education system. He died at home, age 97, on February 2, 1996 in Chapel Hill, North Carolina.

A Functional Analysis of Depression
Fred Keller's 1973 paper, A Functional Analysis of Depression, helped to establish a strong clinical focus on depression that helped to inspire Behavioral activation, as well as other behavioral treatments for clinical problems beyond depression.