Creating engaging and effective elearning experiences is about how content is presented. You could have fantastic, exciting content but if it is presented in a confusing, overwhelming, or even boring way, it won’t have the impact you hope for.
Why Multimedia Principles Matter in Learning Design
When used well, multimedia can turn a static course into an interactive and immersive learning journey that helps learners process information and stay motivated. (If you’re exploring broader strategies for building engaging digital experiences beyond multimedia choices alone, the practical overview in Creating Engaging and Effective eLearning Content helps connect these principles to overall course design.) But without a clear strategy, multimedia can itself easily become overwhelming or distracting. That’s where multimedia principles come in.
In this post, I’ll explore these principles, rooted in cognitive science, that guide designers in using visuals, audio, and text in ways that support learning rather than hinder it.
1. The Coherence Principle — Removing the Non‑Essential
Less is more when it comes to multimedia. I’ve seen courses packed with decorative images, animations, background music, and even memes in an attempt to make things more interesting, but they can very quickly overload the learner’s cognitive capacity and reduce comprehension.
The coherence principle reminds us to ditch the extras and instead focus on including only what directly supports the learning objectives. Every image, animation, or sound should earn its place. (If you want to understand how this principle links back to cognitive load and how learners process information, the overview of major learning theories in Key Learning Theories Every Designer Should Know provides helpful grounding for why “less is more” works.)
2. The Signaling Principle — Guiding Learners’ Attention
Learners need guidance to navigate complex information. The signalling principle is about using cues such as arrows, highlights, or headings to provide that guidance by drawing attention to key points and show how ideas connect. Effective signalling reduces cognitive load and improves retention.
In digital spaces, accessibility matters, so keep WCAG guidelines in mind when choosing how to signal but, with that in mind, signalling might be achieved though highlighting keywords in text, using contrasting colours for critical buttons, or adding voiceover emphasis during explanations.
In addition, I have found that in asynchronous learning spaces and particularly around assessment elements, if you think you have signalled enough, double it. There is something about being online, working individually, and completing assessments that mean learners second guess themselves and lose the ability to take notice of signals. So, lots of clear signals are essential. (Clear signalling also strengthens the clarity and predictability aspects of accessibility. The WCAG Understandable pillar breaks down how headings, labels, and structural cues support cognitive access: WCAG Understandable.)
3. The Redundancy Principle — Avoiding Cognitive Overload
It’s tempting to pair on-screen text with narration, but research shows this can backfire. The redundancy principle advises against presenting identical information in multiple formats at the same time. For example, if you’re narrating a paragraph while displaying the same text on screen, learners may struggle to process both.
Instead, combine visuals with narration or use text sparingly to complement audio. Think of a talk where the expert is reading from a PowerPoint. For many people closing their eyes and listening to the expert or putting headphones on and reading the text is much easier than concentrating on listening and reading at the same time. Not for everyone though which is why the universal design model advocates for multiple formats for learners to choose from rather than using them all at one. Presenting the modes of delivery individually, as outlined in the redundancy principle, increases the accessibility of the learning content. (This aligns closely with perceptual accessibility, especially when balancing text, audio, and visual alternatives, explored further in A Designer’s Guide to WCAG Perceivable Principles.)
4. The Spatial and Temporal Contiguity Principles — Helping Learners Connect Ideas
Timing and placement matter. Instinctually, educators of all types know this and group content by some sort of relational theme. Within this principle, spatial contiguity means placing related text and visuals close together, so learners don’t have to hunt for connections, and temporal contiguity ensures that narration and visuals appear at the same time, not sequentially. You might say that the placement and timing are being used as signals to highlight connection and help learners integrate information more easily, leading to better understanding and recall.
5. The Modality Principle — Using the Right Channel for the Message
This principle takes advantage of how the brain works. Different channels process information differently and this can be leveraged to enhance understanding. Explaining a diagram through audio narration rather than adding lengthy captions can make learning more efficient because learners are looking at the thing being explained rather than switching back and forth between text and the visual. This reduces the strain on the visual channel and levels more cognitive energy for understanding. It’s similar to cognitive load theory. I’ve found that resource constraints in building elearning courses can make this tricky, but it is a good reason to include videos for threshold concepts. (Because this principle depends heavily on how learners access and consume digital media, it connects naturally to how technology shapes modern learning design, outlined in The Role of Technology in Modern Learning Design.)
Bringing It All Together
These are principles, not rules and they need to flex with each course and build environment, creating harmony between content and design. I tend to look at all things through a universal design lens, so I start with two questions: Does this element support the learning goal? Is it clear and easy to process for all learners? If the answer is no, I take a closer look at the principles to find the cause of the problem as well as a way to fix it.
For me, everything in a course, including media, needs to earn its place by adding meaning, connection, and context. Next time you design a course, ask yourself: does every element earn its place? Using these principles as your guide should help you create learning experiences that are not only look good but are also effective.
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