Are there two or three forms of handedness? Most psychological studies investigating handedness have two different categories: left-handedness and right-handedness. A large-scale meta-analysis ...

A recent study suggests that left-handed people have an advantage in competitive contexts, while righties tend to cooperate better. Thank “evolutionarily stable strategy” for the mix. A study ...

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Add Yahoo as a preferred source to see more of our stories on Google. An ax in female hands on a blurred wall background. Old ax with rust close-up. Hand tools for repair and construction. Close-up of ...