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Handedness commonly refers to:
- Handedness, a human attribute reflecting the unequal distribution of fine motor skill between the left and right hands.
Handedness also may refer to:
- Chirality, Greek for handedness, is also used to describe a number of similar concepts in other fields
- In biology, sinistral and dextral are commonly used terms where bilateral symmetry is modified, for example left or right handed snail shells.
- In mechanics and engineering, any helically coiled device such as a spring, screw or propeller necessarily displays handedness, where the "left-handed" or "right handed" character may relate the direction of rotation to the direction of translation.
- Also in mechanics and engineering, most simple tools with two pivoted parts such as pliers or shears have handedness. This may strongly impact the usability of the device, particularly in the case of scissors.
- Edinburgh Handedness Inventory, a measurement scale used to assess the dominance of a person's right or left hand in everyday activities
- Handedness and sexual orientation, research attempting to link the two
- Handedness of Presidents of the United States, research attempting to characterize a causal connection between the fine motor skill and the elected office
- Mathematical handedness, a common synonym for orientation or chirality (mathematics)
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