The Invisible Math of Human Frustration: The Three Kinds of Cognitive Load #HCIExplained S2E14

Your brain has a budget. Good design either spends it wisely or blows it. Not all mental effort is the same — and that distinction turns out to matter enormously for how we design things people actually want to use. Cognitive load theory started in educational psychology, but its core insight migrated quietly into UX and product design, where it shapes decisions from the layout of a settings screen to the way a checkout flow asks for your address. This episode traces that idea carefully: where it came from, what the three types of cognitive load actually describe, and why "just make it simpler" is a more complicated instruction than it sounds. The hosts look honestly at where the research holds up, where it gets fuzzy, and what happens when designers reduce the wrong kind of effort — or accidentally strip out the kind that's genuinely useful. • Why intrinsic load isn't the enemy, even when it feels like friction• The extraneous stuff that quietly exhausts users without their noticing• The third kind of load — the one that actually builds understanding over time• A real product example where simplifying made the experience measurably worse Whether you work in interface design, teach anything to anyone, or just find yourself wondering why some apps feel effortless and others feel like homework, this conversation offers a useful lens. No prior knowledge of HCI or cognitive science needed — just curiosity. Pull up something you use every day before you listen. You'll look at it differently after.