To convey a certain concept, is it better to use a video, an animation, an image, audio, or a simple text? What is the most effective? When designing a course or training, the trainer has plenty of options. But for convenience, we tend to be content with the text, whether oral or written.
However, it has been proven that multiplying the sensory modalities by which we communicate information (image + audio, for example) greatly improves our understanding and memory.
First, transmit learning content via multiple sensory channels (auditory, visual, manual...) highlights various pieces of information that, when linked to each other, lead to a better representation of the concept to be learned. This higher-quality representation will be better understood by The learners and therefore better remembered.
Then, offering learners several sensory modalities to process information distributes the quantity of information perceived by each sense. Indeed, our ability to process several pieces of information at the same time in the same channel, and to maintain them in short-term memory is limited. Multiplying sensory channels makes it possible to Bypass the limits of short-term memory.
An image is worth a thousand words, this effect can be illustrated in the following way. If we consider that long-term memory is a forest and that the concepts to be learned are locations within it, multiplying sensory inputs would be like Multiply the paths that lead to information. The more paths we have, the easier it is to reach the point we are looking for and the better our memory is!
[1] Mayer, R.E., & Anderson, R.B. (1991). Animations Need Narrations: An Experimental Test of a Dual-Coding Hypothesis. Journal of Educational Psychology, 83(4), 484.
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