Dictionary of Human Evolution and Biology

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Handedness

Tendency to display left- or right-hand task preference. Left-handedness is referred to as sinistrality, right-hand preference is called dextrality. There is some evidence that handedness has a genetic component. Tools found at Koobi Fora, Zhoukoudian, and Ambrona, and humeral asymmetry in Neandertals, indicate that the right hand was preferred by early hominids whenever tasks requiring some power were performed. Aka hand preference.

See brain lateralization and the learning rule.

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