Representing object weight in action and perception

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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.