A technique for studying memory, popularized by the English psychologist Sir Frederic Charles Bartlett (1886–1969) in his book Remembering: A Study in Experimental and Social Psychology (1932, Chapter 5) in which a person reproduces learned material on a sequence of occasions over a period of time. Bartlett called it the method of repeated reproduction, and he used the technique to study reconstructive memory. The technique had been introduced by the Welsh schoolteacher Philip Boswood Ballard (1865–1950) in the British Journal of Psychology Monograph Supplements in 1913, although Bartlett did not cite this earlier work. See also hypermnesia, reminiscence (2), War of the Ghosts. Compare serial reproduction.