PMID: 9175451May 1, 1997Paper

Attentional selection and attentional gradients: an alternative method for studying transient visual-spatial attention

Psychophysiology
M Eimer

Abstract

In two experiments, I employed an alternative method for studying transient visual-spatial attention. Instead of using precues, attention was manipulated by presenting most stimuli sequentially at predictable locations. In Experiment 1, most stimuli appeared in a regular clockwise or counterclockwise order, but some were separated by one or both visual meridians from the expected location. In Experiment 2, most stimuli were presented successively along the horizontal meridian, and some stimuli were separated by one, two, or three positions from the expected location. Faster response times and larger posterior P1 and N1 components as well as enhanced negativities at midline electrodes were found for expected-location than for unexpected-location stimuli. These effects were partially modulated by the distance of unexpected stimuli from the current focus of attention, suggesting the existence of attentional gradients. Moreover, the data suggest that the direction of previous attentional shifts and the visual meridians play an important role for spatial attention.

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Citations

Mar 14, 2002·Developmental Psychobiology·John E Richards, Sharon K Hunter
Mar 10, 2001·Brain Research. Cognitive Brain Research·J M Shedden, C L Nordgaard
Jun 23, 1998·Current Opinion in Neurobiology·S A HillyardT F Münte
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Apr 8, 2004·Journal of Cognitive Neuroscience·Martin EimerJon Driver
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Aug 25, 2005·Nutritional Neuroscience·Anling RaoAnna Christina Nobre
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Mar 18, 2015·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Feng GaoHong Li
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Oct 3, 1999·The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology·M H Fischer

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