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Do the upright eyes have it?

Atsushi Senju1, Toshikazu Hasegawa

  • 1University of Tokyo, Tokyo, Japan. senju@mrg.biglobe.ne.jp

Psychonomic Bulletin & Review
|August 9, 2006
PubMed
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Direct eye contact aids social communication by facilitating detection. This effect relies on upright eye morphology, as inverted eyes do not provide the same facilitative signal in visual search tasks.

Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Social cognition

Background:

  • Eye contact is fundamental for social interaction and communication.
  • Direct gaze facilitates the detection of faces.
  • Face inversion, however, significantly reduces this facilitative effect.

Purpose of the Study:

  • To investigate the underlying mechanisms of direct gaze facilitation in face detection.
  • To determine why direct gaze facilitates detection in upright but not inverted faces.
  • To explore the role of eye morphology in processing direct gaze.

Main Methods:

  • Utilized a visual search paradigm.
  • Presented participants with upright and inverted faces with manipulated eye orientations.
  • Assessed search performance and detection accuracy.

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Main Results:

  • Upright eyes facilitated target detection, even when other facial features were inverted or absent.
  • Inverted eyes did not yield a facilitative effect on search performance.
  • Morphological information of upright eyes appears critical for direct gaze processing.

Conclusions:

  • The facilitative effect of direct gaze is dependent on the upright orientation and morphological integrity of the eyes.
  • Distortion of eye morphology, as seen in 'eye inversion,' disrupts the processing of direct gaze.
  • Upright eye configuration plays a critical role in social communication and face perception.