Document Detail


Connectedness affects dot numerosity judgment: implications for configural processing.
MedLine Citation:
PMID:  19451377     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Participants judged the number of dots in visual displays with brief presentations (200 msec), such that the numerosity judgment was based on an instantaneous impression without counting. In some displays, pairs of adjacent dots were connected by line segments, whereas, in others, line segments were freely hanging without touching the dots. In Experiments 1, 2A, and 2B, connecting pairs of dots by line segments led to underestimation of dot numbers in those patterns. In Experiment 3, we controlled for the number of freely hanging line segments, whereas Experiment 4 showed that line segments that were merely attached to dots without actually connecting them did not produce a considerable underestimation effect. Experiment 5 showed that a connectedness effect existed when stimulus duration was reduced (50 msec) or extended (1,000 msec). We conclude that connectivity affects dot numerosity judgments, consistent with earlier findings of a configural effect in numerosity processing. Implications of the role of connectedness in object representation are discussed.
Authors:
Lixia He; Jun Zhang; Tiangang Zhou; Lin Chen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  16     ISSN:  1069-9384     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-05-19     Completed Date:  2009-07-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  509-17     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China. lxhe@cogsci.ibp,ac.cn
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MeSH Terms
Descriptor/Qualifier:
Attention*
Decision Making
Discrimination Learning*
Humans
Judgment*
Mathematics
Optical Illusions
Orientation
Pattern Recognition, Visual*
Problem Solving
Psychophysics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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