PII: S0960-9822(01)00496-1

Most people are perfectly aware of their preferred hand for skilled activities like handwriting, and many are also aware of their preferred foot for activities like kicking a ball or writing with their toe in sand. A lesser-known fact is that we also have a favoured eye for sighting. In our species, but no other, these biases are all rightwards: handedness ~90%, footedness ~80% and ‘eyedness’ ~70%. Much like three tosses of a two-headed coin, it is possible that these three population-biases are all rightwards by chance. Nevertheless, these asymmetries have been linked to the specialisation of the left hemisphere of the brain for language, speech and motor control [1,2].

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