A snapshot is all it takes to encode object locations into spatial memory.
Identifieur interne : 002F93 ( PubMed/Checkpoint ); précédent : 002F92; suivant : 002F94A snapshot is all it takes to encode object locations into spatial memory.
Auteurs : Harry H. Haladjian [Australie] ; Fabien Mathy [France]Source :
- Vision research [ 1878-5646 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- methods : Photic Stimulation.
- physiology : Attention, Memory, Short-Term, Pattern Recognition, Visual, Perceptual Masking, Spatial Memory.
- Analysis of Variance, Female, Humans, Male, Young Adult.
Abstract
This study examines the encoding of multiple object locations into spatial memory by comparing localization accuracy for stimuli presented at different exposure durations. Participants in the longest duration condition viewed masked displays containing 1-10 discs for 1-10 s (durations typically used in simple span tasks), and then reported the locations of these discs on a blank screen. Compared to conditions that presented the same stimuli briefly for 50 or 200 ms (exposures more typical of simultaneous spatial arrays), localization accuracy did not improve significantly under longer viewing durations. Additionally, a clustering analysis found that responses were spread among different clusters of discs and not focused on individual clusters, regardless of viewing duration. A second experiment tested this performance for displays containing two distinct clusters of discs to determine if clearly grouped subsets of objects would improve performance, but there was no substantial improvement for these two-cluster displays when compared to displays with one cluster. Overall, the results indicate that spatial information for a set of objects is extracted globally and quickly, with little benefit from extended encoding durations that should have favored some deliberative form of grouping. Such results cast doubt on the validity of Corsi blocks or equivalent common neuropsychological tests purportedly designed to evaluate specifically spatial short-term memory spans.
DOI: 10.1016/j.visres.2014.12.014
PubMed: 25555565
Affiliations:
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Haladjian</name><affiliation wicri:level="1"><nlm:affiliation>School of Social Sciences and Psychology, University of Western Sydney, Australia. Electronic address: haroutioun@gmail.com.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>School of Social Sciences and Psychology, University of Western Sydney</wicri:regionArea><wicri:noRegion>University of Western Sydney</wicri:noRegion></affiliation></author><author><name sortKey="Mathy, Fabien" sort="Mathy, Fabien" uniqKey="Mathy F" first="Fabien" last="Mathy">Fabien Mathy</name><affiliation wicri:level="4"><nlm:affiliation>Département de Psychologie, Université Nice Sophia Antipolis, France. 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Participants in the longest duration condition viewed masked displays containing 1-10 discs for 1-10 s (durations typically used in simple span tasks), and then reported the locations of these discs on a blank screen. Compared to conditions that presented the same stimuli briefly for 50 or 200 ms (exposures more typical of simultaneous spatial arrays), localization accuracy did not improve significantly under longer viewing durations. Additionally, a clustering analysis found that responses were spread among different clusters of discs and not focused on individual clusters, regardless of viewing duration. A second experiment tested this performance for displays containing two distinct clusters of discs to determine if clearly grouped subsets of objects would improve performance, but there was no substantial improvement for these two-cluster displays when compared to displays with one cluster. Overall, the results indicate that spatial information for a set of objects is extracted globally and quickly, with little benefit from extended encoding durations that should have favored some deliberative form of grouping. Such results cast doubt on the validity of Corsi blocks or equivalent common neuropsychological tests purportedly designed to evaluate specifically spatial short-term memory spans.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25555565</PMID><DateCreated><Year>2015</Year><Month>01</Month><Day>27</Day></DateCreated><DateCompleted><Year>2015</Year><Month>08</Month><Day>31</Day></DateCompleted><DateRevised><Year>2015</Year><Month>01</Month><Day>27</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1878-5646</ISSN><JournalIssue CitedMedium="Internet"><Volume>107</Volume><PubDate><Year>2015</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Vision research</Title><ISOAbbreviation>Vision Res.</ISOAbbreviation></Journal><ArticleTitle>A snapshot is all it takes to encode object locations into spatial memory.</ArticleTitle><Pagination><MedlinePgn>133-45</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.visres.2014.12.014</ELocationID><ELocationID EIdType="pii" ValidYN="Y">S0042-6989(14)00333-2</ELocationID><Abstract><AbstractText>This study examines the encoding of multiple object locations into spatial memory by comparing localization accuracy for stimuli presented at different exposure durations. Participants in the longest duration condition viewed masked displays containing 1-10 discs for 1-10 s (durations typically used in simple span tasks), and then reported the locations of these discs on a blank screen. Compared to conditions that presented the same stimuli briefly for 50 or 200 ms (exposures more typical of simultaneous spatial arrays), localization accuracy did not improve significantly under longer viewing durations. Additionally, a clustering analysis found that responses were spread among different clusters of discs and not focused on individual clusters, regardless of viewing duration. A second experiment tested this performance for displays containing two distinct clusters of discs to determine if clearly grouped subsets of objects would improve performance, but there was no substantial improvement for these two-cluster displays when compared to displays with one cluster. Overall, the results indicate that spatial information for a set of objects is extracted globally and quickly, with little benefit from extended encoding durations that should have favored some deliberative form of grouping. Such results cast doubt on the validity of Corsi blocks or equivalent common neuropsychological tests purportedly designed to evaluate specifically spatial short-term memory spans.</AbstractText><CopyrightInformation>Copyright © 2014 Elsevier Ltd. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Haladjian</LastName><ForeName>Harry H</ForeName><Initials>HH</Initials><AffiliationInfo><Affiliation>School of Social Sciences and Psychology, University of Western Sydney, Australia. Electronic address: haroutioun@gmail.com.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mathy</LastName><ForeName>Fabien</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Département de Psychologie, Université Nice Sophia Antipolis, France. 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Haladjian</name></noRegion></country><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Mathy, Fabien" sort="Mathy, Fabien" uniqKey="Mathy F" first="Fabien" last="Mathy">Fabien Mathy</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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