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dc.contributor.authorLinnet, E
dc.contributor.authorRoser, ME
dc.date.accessioned2019-07-12T14:37:15Z
dc.date.available2019-07-12T14:37:15Z
dc.date.issued2012-06-01
dc.identifier.issn0882-7974
dc.identifier.issn1939-1498
dc.identifier.urihttp://hdl.handle.net/10026.1/14635
dc.descriptionPubMed ID: 21843007
dc.description.abstract

Presentation of bilateral redundant visual stimuli produces faster reaction times (RT) than presentation of a single unilateral stimulus; an effect known as the redundant target effect (RTE; Miller, 1982), and is a means of testing interhemispheric visuomotor integration (Ouimet, 2009). RTEs that exceed expectations, based on Miller's race model of inequality (RMI), are referred to as "enhanced RTEs" and imply neural coactivation. Paradoxically, enhanced RTEs are observed in cases of corpus callosum disruption. The Hemispheric Coactivation Hypothesis accounts for this paradox by positing that bihemispheric processing occurs to both unilateral and bilateral stimuli in the normal brain, but occurs only with bilateral stimuli in the disconnected brain. Neuroimaging has revealed decreases in the microstructural integrity of the corpus callosum with age (Ota et al., 2006), but research investigating the bilateral RTE in healthy older individuals is lacking. The present study investigated the bilateral RTE in healthy younger and healthy older adults using simple RT and choice RT tasks. Our prediction that older individuals would show significantly larger RTEs than younger individuals was found to be true for both tasks. Tests of the RMI produced little evidence for coactivation. The crossed-uncrossed difference, generally used as a means of testing visuomotor interhemispheric transfer, was also investigated, but no age effects were found. The observation of greater RTE in age is congruent with the Hemispheric Coactivation hypothesis (Miller, 2004) in which callosal disconnection is associated with increased RTE.

dc.format.extent399-409
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoen
dc.publisherAmerican Psychological Association (APA)
dc.subjectredundant target effect
dc.subjectredundancy gain
dc.subjectaging
dc.subjectvisuomotor
dc.subjectcorpus callosum
dc.titleAge-Related Differences in Interhemispheric Visuomotor Integration Measured by the Redundant Target Effect
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000305098700013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue2
plymouth.volume27
plymouth.publication-statusPublished online
plymouth.journalPSYCHOLOGY AND AGING
dc.identifier.doi10.1037/a0024905
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Health
plymouth.organisational-group/Plymouth/Faculty of Health/School of Psychology
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA04 Psychology, Psychiatry and Neuroscience
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Centre for Brain, Cognition and Behaviour (CBCB)
plymouth.organisational-group/Plymouth/Research Groups/Centre for Brain, Cognition and Behaviour (CBCB)/Brain
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeUnited States
dc.identifier.eissn1939-1498
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1037/a0024905
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review


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