Abstract
Cognitive load theory has been very influential in educational psychology during the last decade in providing guidelines for instructional design. Whereas numerous empirical studies have used it as a theoretical framework, a closer analysis reveals some fundamental conceptual problems within the theory. Various generalizations of empirical findings become questionable because the theory allows different and contradicting possibilities to explain some empirical results. The article investigates these theoretical problems by analyzing the conceptual distinctions between different kinds of cognitive load. It emphasizes that reduction of cognitive load can sometimes impair learning rather than enhancing it. Cognitive load theory is reconsidered both from the perspective of Vygotski’s concept of the zone of proximal development and from the perspective of research on implicit learning. Task performance and learning are considered as related, but nevertheless fundamentally different processes. Conclusions are drawn for the further development of the theory as well as for empirical research and instructional practice.
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Notes
Sweller (2005) assumes that a smaller working memory is more efficient than a larger one. The argument is that in a working memory including four elements, finding the correct sequence of operations by trial and error is still possible, because the number of permutations is only 24 (4!). In a working memory including 10 elements, on the contrary, the number of permutations would be more than 3 millions (10!), which would no longer allow finding the correct sequence of operations. We are in doubt, however, whether the analogy between biological evolution and cognition really holds at this point. If a task requires n operations to be performed in the right sequence, the learner has to find the right sequence out of the n! possibilities anyway by trial and error, regardless of his/her size of working memory. A larger working memory would then allow longer sequences of operations being stored and memorized and, thus, be more advantageous for learning than a smaller working memory. A larger working memory allows also anticipating longer sequences of operations. According to our knowledge, human working memory is a relatively recent development of evolution, and there are no indications that any human or nonhuman species was disadvantaged due to a too large working memory.
It should be noted that these definitions of cognitive load are not fully equivalent. Learning a particular material (Sweller and Chandler 1994) means the acquisition of knowledge or skills that corresponds to a change in long-term memory. Performing a particular task Sweller et al. (1998) means finding a solution by manipulating an external or internal situation regardless whether or not a change in long-term memory takes place.
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Acknowledgment
We are grateful to John Sweller for various intensive discussions about fundamental issues of cognitive load theory. We also want to thank four anonymous reviewers for their helpful comments on a previous version of this article.
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Schnotz, W., Kürschner, C. A Reconsideration of Cognitive Load Theory. Educ Psychol Rev 19, 469–508 (2007). https://doi.org/10.1007/s10648-007-9053-4
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DOI: https://doi.org/10.1007/s10648-007-9053-4