Into the Labyrinth : A PhD Comprehensive Portfolio

Cognitive load and CTL

Human cognitive ability is limited by the human cognitive architecture. Cognitive load refers to the amount of information that the human brain can process and remember. The load that tasks require of working memory (WM) and long term memory (LTM), need to be considered in complex learning environments. Moving information from the external world, through WM and into LTM is impacted by a range of factors that impact the cognitive load. Cognitive load can impact learning efficacy, as seen in cognitive load theory research.

Cognitive load theory (CLT) primarily focuses on the limited capacity (four items, plus or minus) and duration (20 seconds without refreshing) of WM but considers how LTM schema development and chunking can improve WM limitations (van Merrienboer & Sweller, 2005). CLT suggests that WM, as supported by activation and schema development in LTM, is impacted by intrinsic load, extraneous load, and germane load of the learner’s interaction with the learning material (van Merrienboer & Sweller, 2005). Intrinsic load relates to the complexity of the task determined by the interactivity between elements. This is influenced by the learner’s prior experiences, the quantity of elements to be learned, and effects understanding (van Merrienboer & Sweller, 2005). By reducing task complexity and increasing expertise, the intrinsic load can be reduced. WM can be overwhelmed by extraneous information that is not essential for learning or specific to the task. Extraneous loads on WM do not support effective learning, and can be amended through careful attention to modality, contiguity, redundancy, coherence, signalling, and timing within or between the elements presented to learners (van Merrienboer & Sweller, 2005). When intrinsic cognitive loads are high, extraneous loads should be reduced through careful attention to instructional design. 

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