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💬 WHAT EVERY HUMAN DOES · 03

Two Hundred Milliseconds

In ten unrelated languages on five continents, the gap between a question and its answer peaks in the same fifth of a second.

Anthropologists had long reported cultures with radically different conversational rhythms — long Nordic silences, rapid-fire Japanese. In 2009 a team filmed ordinary informal conversation in ten languages, from hunter-gatherers in Namibia to city dwellers in Tokyo, and measured the gap after every yes-or-no question. The differences turned out to be a quarter of a second.

Two people in mid-conversation across a small table, one leaning in as the other finishes speaking.
The handover happens before the last syllable has landed. It does that everywhere.

    The measured gaps

    Mean time from the end of a yes-or-no question to the start of the answer. The shaded band is the 0–200 ms window every one of the ten languages peaked inside. The widest distance any language mean sat from the cross-language mean was 250 ms.

    The paper reports per-language distributions for all ten languages but gives individual means in the text for the four plotted here. The other six — Dutch, English, Korean, Yélî-Dnye, ǂĀkhoe Haiǁom and one more — are described rather than plotted, so no numbers are invented for them.

    Hear the difference

    Pick a language and play the handover. The gap is drawn to scale against a 600 ms ruler, so the difference between a Japanese and a Danish pause is as wide as it actually is — which is about one syllable.

    Language

    The playback is a timing illustration of the measured means, not a recording. The gap length for each language is the published figure; the question and answer bars are placeholders.

    What the study found

      Where this is argued about

      The 2009 result has been both reinforced and revised by a larger corpus, and the sample size is worth keeping in view.

        Sources

          More ways we’re connected

          Every way to put the same point — that every human line on Earth runs back to one place — in your own hands.

          Your own numbers

          Your birthday crowdA date you share with millions. Your family treeMore branches. Shared roots. Your place, real sizeA fairer view of somewhere you love. A moment we shareDifferent clocks. Happening together.

          The deep record

          Two chains, one continentMitochondrial Eve and Y-chromosomal Adam, drawn against time. The shared ancestor counterType a crowd. Find the ancestor every one of them shares. Count the hands between usFewer than 50 links separate any two people alive. Fourteen peoples, one patternStructural universals across five continents.

          Shifting the frame

          Footsteps of KinshipDrag 300,000 years of leaving Africa, one toolkit at a time. Root to BranchThousands of languages branching from African roots. The Deep Time MirrorYour face, aligned with the oldest skulls we have. The Deep History Time MachineWatch borders, cities and farms fade off the planet. The Great-Grandparent MultiplierYour family tree has to loop. Here is the maths. Stardust & SoilWhat you are made of, and where each atom was forged. The Borderless Night SkySame stars. Many skies. One imagination. The Reverse Migration PostcardA line from your city back to the Great Rift Valley.

          Feel the pattern

          The Converging RiversEvery river runs back to the Rift. Drag to pull a thread home. The Synchronized BreathOne atmosphere. Hold to slow and breathe with the globe. The Shared LexiconMama, water, fire: one breath, many scripts. The Erasure of BordersScroll to peel the modern map down to a starlit Africa. The Mirror of AgesMany shades, one composite face. Unify the spectrum.

          What every human does

          Everybody SingsMusic was in all 315 societies the census read. All of them. The Same FaceBorn blind, never seen a face — and the same smile on winning. Two Hundred MillisecondsTen languages, five continents, one fifth of a second.