Representing object weight in action and perception

熟练的物体操作需要能够预测被操作物体的重量。这样的预测使运动系统能够提前指定适当的运动命令，允许指尖力的平滑和灵巧的控制。体重感知还包括对物体重量的预测。现在人们普遍认为，人们是根据物体的预期或预测重量来判断物体的重量的。这样的预测使我们能够对体重做出比较判断，并将这一信息传达给他人。因此，在操纵物体和判断它们的重量时，重量预测都很重要。

Skilled object manipulation requires the ability to predict the weights of objects being acted upon. Such prediction enables the motor system to specify appropriate motor commands in advance, allowing smooth and dexterous control of fingertip forces. Weight perception also involves predictions about object weight. It is now well established that people judge the weight of an object relative to its expected or predicted weight. Such predictions enable us to make comparative judgments about weight and to communicate this information to others. Thus, weight prediction is important both when manipulating objects and when judging their weights.