| The influence of competing perceptual and motor priors in the context of the size-weight illusion. | |
| | |
MedLine Citation:
|
PMID: 20614213 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
When lifting objects of identical mass but different sizes, people perceive the smaller objects as weighing more than the larger ones (the 'size-weight' illusion, SWI). While individual's grip and load force rates are rapidly scaled to the objects' actual mass, the magnitude of the force used to lift these SWI-inducing objects is rarely discussed. Here, we show that participants continue to apply a greater loading force to a large SWI-inducing cube than to a small SWI cube, lift after lift. These differences in load force persisted long after initial errors in grip and load force rates had been corrected. Interestingly, participants who showed the largest illusion made the smallest errors in load force. This unexpected relationship suggests that the motor system is consistently biased toward the expectations of heaviness for a particular stimulus in a Bayesian fashion, and that this loading error is subsequently reduced by SWI perceptual errors in the opposite direction. |
| | |
Authors:
|
Gavin Buckingham; Melvyn A Goodale |
Related Documents
:
|
15868793 - Sudden loading during a dynamic lifting task: a simulation study. 20407183 - I.2. mechanics of materials. 15116993 - The beck effect is back, now in color: a demonstration. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-08 |
Journal Detail:
|
Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 205 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2010 Aug |
Date Detail:
|
Created Date: 2010-08-03 Completed Date: 2010-11-22 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
|
Languages: eng Pagination: 283-8 Citation Subset: IM |
Affiliation:
|
Centre for Brain and Mind, Department of Psychology, University of Western Ontario, London, Canada. gbucking@uwo.ca |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Female Hand Strength Humans Illusions / psychology* Kinesis Lifting Male Photic Stimulation Physical Exertion Size Perception / physiology* Visual Perception / physiology* Weight Perception / physiology* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
|
//Canadian Institutes of Health Research |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Impact of nosocomial infections on clinical outcome and resource consumption in critically ill patie...
Next Document: Two systems of spatial representation underlying navigation.