title: View-sensitive ERP repetition effects indicate automatic holistic processing of spatially unattended objects.
abstract: This study examined the properties of ERP effects elicited by unattended (spatially uncued) objects using a short-lag repetition-priming paradigm. Same or different common objects were presented in a yoked prime-probe trial either as intact images or slightly scrambled (half-split) versions. Behaviourally, only objects in a familiar (intact) view showed priming. An enhanced negativity was observed at parietal and occipito-parietal electrode sites within the time window of the posterior N250 after the repetition of intact, but not split, images. An additional post-hoc N2pc analysis of the prime display supported that this result could not be attributed to differences in salience between familiar intact and split views. These results demonstrate that spatially unattended objects undergo visual processing but only if shown in familiar views, indicating a role of holistic processing of objects that is independent of attention.
authors.affiliation: School of Psychology, University of East London, Stratford, London E15 4LZ, UK.
authors.forename: Elley
authors.initials: E
authors.lastname: Wakui
authors.affiliation: School of Psychology, University of East London, Stratford, London E15 4LZ, UK.
authors.forename: Volker
authors.initials: V
authors.lastname: Thoma
authors.affiliation: Department of Psychology, Goldsmiths, University of London, New Cross, London SE14 6NW, UK.
authors.forename: Jan W
authors.initials: JW
authors.lastname: de Fockert
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D021641:Recognition, Psychology / Q000502:physiology*; D060865:Repetition Priming / Q000502:physiology*; D013997:Time Factors; D055815:Young Adult
keywords: Event-related Potentials (ERP); N250; Object Recognition; Repetition priming; Spatially unattended objects