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Related Experiment Video

Updated: Jul 20, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Spatial attention: different mechanisms for central and peripheral temporal precues?

Z L Lu1, B A Dosher

  • 1Department of Psychology, University of Southern California, Los Angeles 90089-1061, USA. zhonglin@rcf.usc.edu

Journal of Experimental Psychology. Human Perception and Performance
|October 20, 2000
PubMed
Summary

Spatial attention mechanisms were studied using the external noise paradigm. Both central and peripheral precuing improved performance in high external noise, with peripheral precuing also effective in low noise.

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Attention Studies

Background:

  • Spatial attention influences visual perception.
  • Location precuing is a method to study attentional mechanisms.
  • External noise paradigms assess performance under varying visual clutter.

Purpose of the Study:

  • To investigate the mechanisms of spatial attention.
  • To examine the effects of central versus peripheral precuing.
  • To understand how external noise impacts attention.

Main Methods:

  • Applied the external noise paradigm (Lu & Dosher, 1998).
  • Used central and peripheral precuing to cue observers.
  • Task involved identifying pseudocharacters in varying levels of external noise.

Main Results:

  • Both central and peripheral precuing reduced thresholds in high external noise.
  • Peripheral precuing significantly reduced thresholds in low or no external noise.
  • A perceptual template model differentiated attentional mechanisms.

Conclusions:

  • Central precuing primarily uses external noise exclusion.
  • Peripheral precuing employs both noise exclusion and stimulus enhancement (or internal noise reduction).
  • Different precuing methods engage distinct attentional mechanisms.