Publications [#277466] of Marty G. Woldorff

Journal Articles

1. Luck, SJ; Hillyard, SA; Mouloua, M; Woldorff, MG; Clark, VP; Hawkins, HL (1994). Effects of spatial cuing on luminance detectability: psychophysical and electrophysiological evidence for early selection.. Journal of Experimental Psychology. Human Perception and Performance, 20(4), 887-904.
   (last updated on 2023/06/01)

   Abstract:
   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.