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Exploratory MEG study of the illusory contour perception: positive and inverted effects

Author

Listed:
  • Elena Evina

    (National Research University Higher School of Economics. Laboratory of Cognitive Psychophysiology)

  • Dzerassa Goyaeva

    (National Research University Higher School of Economics. Laboratory of Cognitive Psychophysiology)

  • Platon Pronko

    (National Research University Higher School of Economics. Laboratory of Cognitive Psychophysiology)

  • Boris Chernyshev

    (National Research University Higher School of Economics. Laboratory of Cognitive Psychophysiology, Head; National Research University Higher School of Economics. Department of Psychophysiology, Assistant Professor;)

Abstract

The illusory contour is one of the most often used models in studies of Gestalt perception. In our MEG study we observed the so-called illusory contour effect (IC-effect): the activity of nonprimary visual and associative cortical areas was increased during the 150-250 ms time window after a stimulus onset in response to illusory stimulus, compared with the control stimulus. In addition to the positive IC-effect, the inverted IC-effect was revealed for the first time in adults. In our study it was manifested during the 60-120 ms window after the onset of stimulus. The inverted IC-effect is an early decrease in the activity of the visual cortex in response to the illusory contour compared with the control stimulus. The mechanism of the inverted IC-effect is yet unclear. The “bottom-up” and “top-down” hypotheses of the origin of the inverted IC-effect are discussed.

Suggested Citation

  • Elena Evina & Dzerassa Goyaeva & Platon Pronko & Boris Chernyshev, 2013. "Exploratory MEG study of the illusory contour perception: positive and inverted effects," HSE Working papers WP BRP 07/PSY/2013, National Research University Higher School of Economics.
    • Handle: RePEc:hig:wpaper:07psy2013
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    More about this item

    Keywords

    Gestalt perception; vision; illusory contour; MEG; Kanizsa figure;
    All these keywords.

    JEL classification:

    • Z - Other Special Topics

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