Pilacinski Artur, Vandenberghe Antoine, Andrietta Gabriella, Vannuscorps Gilles
Medical Faculty, Ruhr University Bochum, Bochum, Germany.
Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Louvain, Belgium.
Commun Psychol. 2024 Nov 1;2(1):104. doi: 10.1038/s44271-024-00153-x.
Motor planning and motor imagery are assumed to use veridical internal representations of the biomechanical properties of our limbs. Here, we report that people underestimate their hands' range of motion. We used two tasks probing representations of own motion range, estimation and imagery, in which participants were supposed to judge their rotational hand movement ranges. In both tasks participants' judgments were underestimated in three out of four cardinal directions. We suggest that this representational bias provides an optimal balance between movement efficiency and safety in face of the inherently stochastic nature of movement execution.
运动规划和运动想象被认为使用了我们肢体生物力学特性的真实内部表征。在此，我们报告人们低估了自己手部的运动范围。我们使用了两项探究自身运动范围表征的任务，即估计和想象，参与者需要判断自己手部的旋转运动范围。在这两项任务中，参与者在四个基本方向中的三个方向上的判断都被低估了。我们认为，面对运动执行中固有的随机性，这种表征偏差在运动效率和安全性之间提供了最佳平衡。
