Cognitive Load Theory (CLT) is an instructional theory that starts from the idea that our working memory is limited with respect to the amount of information it can hold, and the number of operations it can perform on that information (Van Gerven et. al., 2003). That means a learner should be encouraged to use his or her limited working memory efficiently, especially when learning a difficult task (Van Gerven et. al., 2003). We need to recognize the role and the limitation of working memory to help develop quality instruction (Cooper, 1998). Thus, we as instructional designers need to find ways to help optimize the working memory. Hence, the key aspect of the theory is the relation between long-term memory and working memory, and how instructional materials interact with this cognitive system (Ayres, 2006).
Diane Gusa on 22 Jun 12First, we propose a theory of multimedia learning based on the assumptions that humans possess separate systems for processing pictorial and verbal material (dual-channel assumption), each channel is limited in the amount of material that can be processed at one time (limited-capacity assumption), and meaningful learning involves cognitive processing including building connections between pictorial and verbal representations (active-processing assumption). Second, based on the cognitive theory of multimedia learning, we examine the concept of cognitive overload in which the learner's intended cognitive processing exceeds the learner's available cognitive capacity. Third, we examine five overload scenarios. For each overload scenario, we offer one or two theory-based suggestions for reducing cognitive load, and we summarize our research results aimed at testing the effectiveness of each suggestion. Overall, our analysis shows that cognitive load is a central consideration in the design of multimedia instruction.
