Material evidence: interaction of well-learned priors and sensorimotor memory when lifting objects

摘要

in our daily lives, we are required to lift a wide array of objects that differ in size and material. To lift an object efficiently, an accurate prediction of the object weight is essential (Flanagan et al. 2006; Johansson and Flanagan 2009a; Johansson and Westling 1988; Wolpert and Flanagan 2001). For instance, when lifting an object 1 or 2 cm off a surface, people typically smoothly increase vertical load force to a level that just exceeds the predicted weight of the object. When this prediction is accurate, the object is lifted smoothly and efficiently.