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The impetus theory in judgments about object motion: A new perspective.
MedLine Citation:
PMID:  22851410     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Several tendencies found in explicit judgments about object motion have been interpreted as evidence that people possess a naive theory of impetus. The theory states that objects that are caused to move by other objects acquire force that determines the kind of motion exhibited by the object, and that this force gradually dissipates over time. I argue that the findings can better be understood as manifestations of a general understanding of externally caused motion based on experiences of acting on objects. Experiences of acting on objects yield the idea that properties of the cause of motion are transmitted to the effect object. This idea functions as a heuristic for explicit predictions of object motion under conditions of uncertainty. This accounts not only for the findings taken as evidence for the impetus theory, but also for several findings that fall outside the scope of the impetus theory. It has also been claimed that judgments about the location at which a moving object disappeared are influenced by the impetus theory. I argue that these judgments are better explained in a different way, as best-guess extrapolations made by the visual system as a practical guide to interactions with the object, such as interception.
Authors:
Peter A White
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-1
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  -     ISSN:  1531-5320     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
School of Psychology, Cardiff University, Tower Building, Park Place, Cardiff, CF10 3YG, Wales, UK, WhitePA@cardiff.ac.uk.
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