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Related Experiment Videos

Visual information transfer across eye movements in the monkey.

Paul S Khayat1, Henk Spekreijse, Pieter R Roelfsema

  • 1Department of Vision and Cognition, The Netherlands Ophthalmic Research Institute, Meibergdreef 47, 1105 BA Amsterdam. p.khayat@ioi.knaw.nl

Vision Research
|September 24, 2004
PubMed
Summary

The preview effect in vision shows that information before an eye movement aids processing afterward. Monkeys demonstrated that consistent visual information before saccades benefits performance, suggesting attended information is stored in transsaccadic memory.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Primate Vision

Background:

  • The eyes continuously move to sample the visual environment.
  • The 'preview effect' suggests information acquired before eye movements (saccades) aids subsequent processing.
  • The precise nature of transsaccadic memory, which holds information across saccades, is debated.

Purpose of the Study:

  • To investigate preview effects in monkeys performing a visual task.
  • To determine how consistency of visual information across saccades impacts performance.
  • To elucidate the characteristics of information stored in transsaccadic memory.

Main Methods:

  • Monkeys performed a contour-grouping (curve-tracing) task.
  • The consistency between pre-saccadic and post-saccadic visual information was manipulated.

Related Experiment Videos

  • Preview effects were measured by comparing performance with consistent versus inconsistent information.

    • Main Results:

    • Consistent pre-saccadic information led to a preview benefit, while inconsistent information caused a preview cost.
    • These effects were largely independent of pre-saccadic viewing duration, occurring even with brief 10 ms exposures.
    • The entire relevant visual curve, not just the saccade target, was shown to be stored in transsaccadic memory.

    Conclusions:

    • Preview effects are mediated by a mechanism that stores attended sensory information for use after a saccade.
    • This suggests a strong link between attention, short-term memory, and transsaccadic memory.
    • The findings provide insights into how the brain maintains visual information across eye movements.