People Aren't Born as Righties or Lefties—They Develop Hand Dominance With Practice, a New Study Suggests

A new study suggests that people develop much of their dominant hand's superior skill through years of practice rather than being born with one hand that is inherently better at movement. Experiments involving reaching, tool use, handwriting and elbow writing showed that both sides can learn at similar rates when they begin with equal experience.

一项新研究表明，惯用手的技能优势很大程度上来自多年练习，而不是因为人天生就有一只手更擅长控制动作。伸手、工具使用、书写和用手肘写字等实验显示，当身体两侧拥有相同的起点和经验时，它们能够以相近的速度学习。