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17h ago
Here’s why the majority of people are right-handed, according to study
Nypost.com and 1 more
- A new PLOS Biology study links the global right-handed bias to two human traits: upright walking and larger brains.
- Researchers analyzed 2,025 individuals across 41 primate species to model handedness in humans.
- The model showed that brain size and limb proportions shift the predicted bias toward the actual human pattern.
- The study suggests culture reinforces a biological tendency rather than creating it from scratch.
- The researchers traced handedness evolution from early hominins to Homo sapiens, indicating a strengthening bias with bigger brains and bipedal bodies.
- The findings indicate that the right-hand dominance likely arose from a broad transformation—upright posture and brain growth—rather than language or tool use alone.
- The study notes that no known human society is predominantly left-handed, supporting a biological basis with cultural reinforcement.
- The authors highlight that handedness is influenced by multiple factors, not a single gene.
- The research emphasizes an integrated view of evolution, where physical changes paved the way for later neural and cultural developments.
- The study’s scope included primates to place human handedness in an evolutionary context.
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