Living in a material world: how visual cues to material properties affect the way that we lift objects and perceive their weight.

摘要: The visual properties of an object provide many cues as to the tensile strength, compliance, and density material from which it is made. However, not well understood how these implicit associations affect our perceptions they determine initial forces that are applied when picked up. Here we examine effects on such by using classic "material-weight illusion" (MWI). Grip load were measured in three experiments participants lifted cubes made metal, wood, expanded polystyrene. These adjusted have a different mass than would be expected for particular material. For lifts, scaled weight each object, metal block was gripped with more force polystyrene one. After few however, their actual blocks, implicitly disregarding misleading block's composition (experiments 1 2). Despite this rapid rescaling, experienced robust MWI throughout duration experiments. In fact, grip never matched perception until differences surface between blocks removed (experiment 3). findings discussed relation recent debates about underlying causes weight-based illusions effect top-down action.