Divergence of categorical and coordinate spatial processing assessed with ERPs

Neuropsychologia
Rob H J van der LubbeAlbert Postma

Abstract

The spatial relation between two objects may be described either precisely or more coarsely in abstract terms, denoted as coordinate and categorical descriptions, respectively. These descriptions may reflect the outcomes of two spatial coding processes, which are realized in the left- and right-hemisphere. Support for this account comes from visual field effects in categorical and coordinate judgment tasks and from patient studies. In the current study, this hypothesis was tested by using event-related potentials (ERPs) and source localization. ERPs yield information about the processing stage at which the hypothesized categorical and coordinate processing diverge due to different task demands, especially in our S1-S2 version of the Bar Dot task. A centrally presented Bar Dot (S1) was followed after 2.5s by a second one (S2) in the left or right visual field; participants had to judge whether S2 matched S1 at the categorical, or, in a second task, at the coordinate level. Behavioral measures revealed a left-field advantage in the coordinate task that was absent in the categorical task. S1s elicited stronger early and late bilateral posterior responses in the coordinate than in the categorical task, possibly related to a compens...Continue Reading

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Citations

Jan 9, 2009·Laterality·Katie L MeadmoreRomola S Bucks
Jul 8, 2009·Journal of Cognitive Neuroscience·Rob H J Van der LubbeAlbert Postma
Apr 8, 2011·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Ineke J M van der HamAlbert Postma
Sep 24, 2015·Applied Neuropsychology. Adult·Virginie Descloux, Roland Maurer
May 15, 2007·Neuropsychologia·Ineke J M van der HamAlbert Postma
Mar 25, 2011·Cognitive Science·Bruno LaengChikashi Michimata
Aug 5, 2009·Brain Research·Ineke J M van der HamAlbert Postma
May 27, 2014·Neuroscience and Biobehavioral Reviews·Ineke J M van der HamBruno Laeng
Sep 9, 2008·Brain and Cognition·Anna OleksiakRichard J A van Wezel

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