Year: 2009
Type: article
Abstract: 1899). Interestingly, a metal block that has been adjusted to have the same size and mass as a polystyrene block will feel lighter than the polystyrene block. We recently showed that participants experiencing this material‐weight illusion ’ (MWI) do not apply forces that match their perceptual experience of heaviness ‐ just like in the size‐weight illusion (Flanagan & Beltzner, 2000). Participants in lifted specially constructed 10 cm3 blocks. – An aluminium block, hollowed out to weigh 720 g. – An expanded polystyrene block, filled with lead to weigh 680 g. Awood block naturally weighing 700 g Ema: g uc ng uwo.ca; We: ttp: pu s.uwo.ca ~g uc ng Our previous study showed that forces on early trials were scaled to each participant’s expectations of how much a particular block should weigh ‐ excessive force was applied to the metal block and insufficient force was applied to the polystyrene block. Forces on later trials scaled to the real weight of each block ‐ identical levels of force were applied to all the blocks. MWI persisted throughout – the polystyrene block felt the heaviest and the metal block felt the lightest. We followed this finding up with two experiments: Experiment 1 – different weight, different material: We adjusted the weight of each block slightly in the opposite direction to the illusion, predicting that we would find opposing perceptual and motor responses (e.g., Grandy & Westwood, 2006).
Institution: Western University
Language: English
Topic: Motor Control and Adaptation
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W593685100