Object-related attention: an event-related potential study.
In two experiments reaction time (RT) and event-related potentials (ERPs) were measured to visual stimuli consisting of two objects (Duncan, 1984; Vecera & Farah, 1994). Target stimuli were defined by two features, which either were distributed between the two objects or belonged to a single object. In Experiment 1 the two objects appeared in spatial overlap, whereas in Experiment 2 the two objects were spatially separated. In both experiments RT was shorter in the single-object condition. The late positive component of the ERP (P3) emerged, peaked, and declined earlier in the single-object condition. It is suggested that object-related attention may facilitate the earlier onset of search for the relevant features.
Czigler
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Institute for Psychology of the Hungarian Academy of Sciences. Czigler@CogPsyPhy.hu
Balázs
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L
D000328:Adult; D001288:Attention / Q000502:physiology*; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time; D014796:Visual Perception / Q000502:physiology*