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Distributed Practice : ウィキペディア英語版 | Distributed Practice Distributed practice (also known as spaced repetition or spaced practice) is a learning strategy, where practice is broken up into a number of short sessions - over a longer period of time. Humans and animals learn items in a list more effectively when they are studied in several sessions spread out over a long period of time, rather than studied repeatedly in a short period of time, a phenomenon called the spacing effect. The opposite, massed practice, consists of fewer, longer training sessions. It is generally a less effective method of learning. For example, when studying for an exam dispersing your studying more frequently over a larger period of time will result in more effective learning than intense study the night before. ==History== thumb Influential German psychologist Hermann Ebbinghaus first observed the effect of distributed learning, and published his findings in ''Memory: A Contribution to Experimental Psychology''. Using himself as a subject, Ebbinghaus studied lists of nonsense syllables to control for confounding variables such as prior knowledge, allowing him to discover the spacing effect and serial position effect.〔Ebbinghaus,H., Ruger, H.A., Bussenius, C.E. (1913) Memory: A contribution to experimental psychology〕 An early study that researched the effects of distributed practice was done by Alan Baddeley and Longman in 1978. They researched the effectiveness of distributed practice by teaching postmen how to type using a new system on a typewriter, and comparing massed and spaced learning schedules. Baddeley found that although massed practice would seem a more effective learning method because the participants would be able to learn the material in fewer days, the postmen who were taught using shorter sessions stretched over multiple days learned the material better than those who had the longer training sessions. Those who learned how to type with shorter learning sessions, spaced over more days ended up with more accurate and quicker typing.〔Baddeley, A.D., Longman, D. J. A., (1978) "The Influence of Length and Frequency of Training Sessions on the Rate of Learning to Type." Ergonomics V21 No8, 627-635.〕
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