
author
1850–1909
Best known for turning memory into something that could be tested, measured, and graphed, this German psychologist helped show how quickly we forget—and how spaced review can help us remember. His work still shapes the way people study and think about learning today.

by Hermann Ebbinghaus
Hermann Ebbinghaus was a German psychologist born in 1850 who became one of the first researchers to study memory with careful experiments. He is widely recognized for pioneering the experimental study of memory, especially through controlled tests of rote learning and recall.
Working largely on his own, he used lists of invented “nonsense syllables” so he could study learning without the extra help of meaning or prior knowledge. From this work came some of his most lasting ideas, including the forgetting curve, the spacing effect, and observations that later became known as the serial-position effect.
Ebbinghaus published his landmark book Über das Gedächtnis in 1885, later translated as Memory: A Contribution to Experimental Psychology. He taught at the universities of Berlin, Breslau, and Halle, and his methods helped establish memory research as a serious scientific field.