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Evidence for divided automatic attention.

P S Silva1, L E Ribeiro-do-Valle

  • 1Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brasil.

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Medicas E Biologicas
|February 26, 2008
PubMed
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Automatic visual attention can divide into two separate spatial foci, not just one. This research suggests that the area between these foci is partially spared during divided attention tasks.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Attention

Background:

  • The capacity of visual attention to form multiple spatial foci remains debated.
  • Voluntary visual attention is known to divide spatially.
  • The current study investigates whether automatic visual attention also exhibits spatial division.

Purpose of the Study:

  • To determine if automatic visual attention can be divided into two independent spatial foci.
  • To compare the spatial distribution of automatic attention with voluntary attention.
  • To explore the processing of stimuli presented between two attended locations.

Main Methods:

  • Thirty-six female volunteers participated in a visual attention experiment.
  • Prime stimuli were presented in either the left or right visual hemifield.

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  • Target stimuli were presented at primed, intermediate, or contralateral locations, with varying prime configurations (single, all rings, superior and inferior rings).

    • Main Results:

    • Reaction times to targets at primed locations were faster than at contralateral locations.
    • This attentional benefit was reduced or absent for targets presented in the intermediate location following a double-ring prime.
    • This indicates a potential division of automatic visual attention.

    Conclusions:

    • Automatic visual attention can, to some extent, focus on two separate spatial locations simultaneously.
    • The region between two simultaneously attended locations may receive reduced attentional processing.
    • Findings contribute to understanding the flexibility and limitations of automatic attentional control.