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 neo-Kantian philosopher Julius Ebbinghaus.

A learning curve is a graphical representation of the relationship between how proficient people are at a task and the amount of experience they have. Proficiency usually increases with increased experience, that is to say, the more someone, groups, companies or industries perform a task, the better their performance at the task.