Humans Naturally Turn Left, Study Reveals

When walking in an open, unfamiliar space without any specific direction, humans exhibit an innate tendency to turn counterclockwise, or to the left. This phenomenon holds true regardless of social rules like right- or left-hand traffic, cultural background, age, or whether someone is right- or left-handed. Researchers from the University of Navarra in Spain and the University of Tokyo in Japan confirmed this through international comparative experiments with pedestrians, publishing their findings in the journal Nature Communications.

“

People showed a bias almost immediately upon being placed in the space.

The study originated from research into social distancing during the COVID-19 pandemic in 2020. Iñaki Echeverría-Huarte and his team observed that pedestrians, when maintaining distance, unconsciously turned left 32 out of 33 times. To verify if this was due to environmental factors like room structure, they conducted five additional experiments with 573 participants under varying conditions. The results remained consistent: in a spacious schoolyard, 80% of participants began moving in a counterclockwise circle within seconds. Even in "solo walking" experiments where no contact with others was possible, 75% of participants moved counterclockwise.

Further investigations explored cultural influences by conducting experiments in Spain, where right-hand traffic is common, and Japan, a left-hand traffic country. While Spanish pedestrians typically avoid oncoming people by moving to the right, and Japanese pedestrians to the left, both groups, when allowed to walk freely in a circular space, invariably moved counterclockwise. The researchers concluded, "This shows that the phenomenon is not a social strategy to avoid walls or collisions, but rather an ingrained tendency within the individual's body."

“

This shows that the phenomenon is not a social strategy to avoid walls or collisions, but rather an ingrained tendency within the individual's body.

Interestingly, children under five in a Japanese kindergarten displayed an even stronger counterclockwise bias than adults, suggesting the tendency is innate rather than learned. The study also notes that track sports like athletics and skating are run counterclockwise, possibly linked to this biological factor. While theories about Coriolis force or Earth's magnetic field were considered, they were deemed unlikely. The researchers hypothesize that subtle asymmetries in the body's balance-regulating vestibular system or sensory nervous system might be the cause, similar to why people tend to veer to one side when walking with eyes closed. This innate directional bias is observed in various species, including schools of fish and ant colonies, suggesting a fundamental aspect of movement in the natural world. The findings could inform the design of public spaces like airports and museums for more efficient pedestrian flow.

“

The stronger counterclockwise movement seen in children suggests this bias is innate, not acquired.