How Cognitive Science and Neurodiversity Research Should Reshape the Way We Teach Complex Ideas

Open almost any online course, corporate training module, or educational slide deck in 2026 and you will find the same default gesture: dense content broken into bullet points. The bullet is the visual idiom of modern learning design. It signals clarity. It promises ease. For many of us, it is the first formatting move we make when a paragraph starts to feel “too long.”
Yet decades of cognitive science suggest that this default is often wrong — not slightly wrong, but consequentially wrong for the kinds of learning we say we care about most. The bullet is excellent at one thing (quick reference) and poor at something else entirely (building durable understanding of connected ideas). When we confuse these two goals, we produce materials that feel educational while failing to educate.
This article makes the case, from the research literature, for a more careful approach to formatting complex material — one that treats format not as decoration but as a cognitive variable that directly shapes what learners take away. We will look at what working memory can and cannot do, why prose and bullets operate on different cognitive systems, and what research on neurodivergent learners reveals about a common but mistaken assumption: that fragmenting information is always an act of accessibility. The truth, as is so often the case, is more interesting than the folk wisdom.
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