Hermann Ebbinghaus — German Psychologist born on January 24, 1850, died on February 26, 1909
Hermann Ebbinghaus was a German psychologist who pioneered the experimental study of memory, and is known for his discovery of the forgetting curve and the spacing effect. He was also the first person to describe the learning curve. He was the father of the eminent neo-Kantian philosopher Julius Ebbinghaus... (wikipedia)