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Related Experiment Videos

The persistence of position.

B Krekelberg1

  • 1Department of Zoology and Neurobiology ND7/30, Ruhr University Bochum, 44780 Bochum, Germany. bart@neurobiologie.ruhr-uni-bochum.de

Vision Research
|February 13, 2001
PubMed
Summary
This summary is machine-generated.

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A new visual signal, position persistence, tracks an object's last seen location for at least 180 ms. This signal is independent of object intensity and background, but affected by speed and may represent shape information.

Area of Science:

  • Visual perception
  • Psychophysics
  • Cognitive neuroscience

Background:

  • Visible persistence is a known visual phenomenon.
  • The properties of position persistence differ from visible persistence.

Purpose of the Study:

  • To describe a novel visual signal termed position persistence.
  • To characterize the properties and implications of position persistence.

Main Methods:

  • Described the characteristics of the position persistence signal.
  • Investigated the signal's duration, dependencies, and information content.

Main Results:

  • Position persistence lasts at least 180 ms for briefly visible objects.
  • The signal is unaffected by object/background intensity but decreases with speed.

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  • Shape information may be represented after ~100 ms, but color information is absent.

    • Conclusions:

    • Position persistence is a distinct visual signal tracking object location.
    • Its properties suggest it is a psychophysical signature of parallel visual processing.