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10 - The Redundancy Principle in Multimedia Learning

Published online by Cambridge University Press:  05 June 2012

John Sweller
Affiliation:
University of New South Wales
Richard Mayer
Affiliation:
University of California, Santa Barbara
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Summary

Abstract

The redundancy principle suggests that redundant material interferes with rather than facilitates learning. Redundancy occurs when the same information is presented in multiple forms or is unnecessarily elaborated. In this chapter, the long, but until recently unknown, history of the principle is traced. In addition, an explanation of the principle using cognitive load theory is provided. The theory suggests that coordinating redundant information with essential information increases working memory load, which interferes with the transfer of information to long-term memory. Eliminating redundant information eliminates the requirement to coordinate multiple sources of information. Accordingly, instructional designs that eliminate redundant material can be superior to those that include redundancy.

Introduction

The history of the redundancy effect or principle is a history of academic amnesia. The effect has been discovered, forgotten, and rediscovered many times over many decades. This unusual history probably has two related causes: first, the effect is seen as counterintuitive by many researchers and practitioners and second, until recently, there has not been a clear theoretical explanation to place it into context. As a consequence of these two factors, demonstrations of the effect have tended to be treated as isolated peculiarities unconnected to any mainstream work. Memories of each demonstration have faded with the passage of time until the next demonstration has appeared. Worse, each demonstration has tended to be unconnected to the previous one. Hopefully, current explanations of the effect can alter this lamentable state of affairs.

Type
Chapter
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Publisher: Cambridge University Press
Print publication year: 2005

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