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Related Experiment Videos

Oculomotor readiness and covert orienting: differences between central and peripheral precues.

P A Reuter-Lorenz1, R Fendrich

  • 1Department of Psychology, University of Michigan, Ann Arbor 48104.

Perception & Psychophysics
|September 1, 1992
PubMed
Summary

Invalid precues incur costs dependent on cue-target spatial relationships. Different orienting mechanisms engage with central versus peripheral precues, impacting oculomotor and attentional shifts differently.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Attention

Background:

  • Invalid precues can incur costs in attention tasks.
  • The spatial relationship between cues and targets influences these costs.
  • Oculomotor programs are hypothesized to mediate attention shifts.

Purpose of the Study:

  • To investigate if spatial relationships affect attention costs similarly for covert orienting and saccadic responses.
  • To determine if central and peripheral precues engage different orienting mechanisms.
  • To explore the relationship between oculomotor and attentional orienting based on precue type.

Main Methods:

  • Participants performed manual (covert orienting) and saccadic response tasks.
  • Invalid precues were presented centrally and peripherally.

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  • The spatial relationship between cue and target locations was systematically varied.

    • Main Results:

    • Central precues showed meridian effects for both manual and saccadic costs (greater when cue/target crossed the vertical meridian).
    • Peripheral precues did not show meridian effects.
    • A dissociation was observed for peripheral precues: manual costs increased with target eccentricity, while saccadic costs increased with cue eccentricity.

    Conclusions:

    • Central and peripheral precues engage distinct orienting mechanisms.
    • The interplay between oculomotor and attentional orienting depends on the precue type.
    • Interdependence is greater with central precues, suggesting different underlying processes.