Effects of spatial cuing on luminance detectability: psychophysical and electrophysiological evidence for early selection.

Published

Journal Article

Three experiments were conducted to determine whether attention-related changes in luminance detectability reflect a modulation of early sensory processing. Experiments 1 and 2 used peripheral cues to direct attention and found substantial effects of cue validity on target detectability; these effects were consistent with a sensory-level locus of selection but not with certain memory- or decision-level mechanisms. In Experiment 3, event-related brain potentials were recorded in a similar paradigm using central cues, and attention was found to produce changes in sensory-evoked brain activity beginning within the 1st 100 ms of stimulus processing. These changes included both an enhancement of sensory responses to attended stimuli and a suppression of sensory responses to unattended stimuli; the enhancement and suppression effects were isolated to different neural responses, indicating that they may arise from independent attentional mechanisms.

Full Text

Duke Authors

Cited Authors

  • Luck, SJ; Hillyard, SA; Mouloua, M; Woldorff, MG; Clark, VP; Hawkins, HL

Published Date

  • August 1994

Published In

Volume / Issue

  • 20 / 4

Start / End Page

  • 887 - 904

PubMed ID

  • 8083642

Pubmed Central ID

  • 8083642

International Standard Serial Number (ISSN)

  • 0096-1523

Language

  • eng

Conference Location

  • United States