Demand placed on limited processing resources by a task or concurrent activity. A manipulation of cognitive load may affect attention, working memory and strategy together; interpreting a difference requires checking which task information remained available.
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Cognitive load refers to the amount of mental effort being used in the working memory. It is a concept derived from cognitive psychology that describes how our brains process information and the limitations of our cognitive resources. The theory of cognitive load was developed by John Sweller in the 1980s and has implications for teaching and learning.