November 2002
Volume 2, Issue 7
Free
Vision Sciences Society Annual Meeting Abstract  |   November 2002
Attentional modulation of target-flanker lateral interactions persists with increasing flanker contrast
Author Affiliations
  • E. D. Freeman
    University College London, UK
  • J. Driver
    University College London, UK
  • D. Sagi
    The Weizmann Institute of Science, Israel
Journal of Vision November 2002, Vol.2, 452. doi:10.1167/2.7.452
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      E. D. Freeman, J. Driver, D. Sagi; Attentional modulation of target-flanker lateral interactions persists with increasing flanker contrast. Journal of Vision 2002;2(7):452. doi: 10.1167/2.7.452.

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Abstract

Purpose

Detection of a central low-contrast Gabor target often improves when it is flanked by suprathreshold collinear patches. We recently reported that such ‘lateral interactions’ depend on whether the collinear flankers are attended for a secondary task (Freeman et al., 2002, Nat. Neurosc. 4(10):1032–1036). Here we tested whether attended flankers facilitate the target more because they have higher effective contrast than when unattended. If true, increasing flanker contrast should overcome the attentional effect.

Method

Two pairs of flankers were displayed in an ‘X’ configuration around a central target Gabor, which was collinear with one flanker-pair and orthogonal to the other. A Vernier task was performed on one flanker-pair while the other pair was task-irrelevant. The contrast of all flankers was varied together over a wide range of values.

Freeman, E. D., Driver, J., Sagi, D.(2002). Attentional modulation of target-flanker lateral interactions persists with increasing flanker contrast [Abstract]. Journal of Vision, 2( 7): 452, 452a, http://journalofvision.org/2/7/452/, doi:10.1167/2.7.452. [CrossRef]
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