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Updated: Feb 2, 2026

A Within-subjects Experimental Protocol to Assess the Effects of Social Input on Infant EEG
Published on: May 3, 2017
Infants Perceive Three-Dimensional Subjective Contours
Michael Kavšek1, Stephanie Braun1
1Unit of Developmental and Educational Psychology, Department of Psychology, University of Bonn, Germany.
Abstract:
The addition of crossed horizontal disparity enhances the clarity of illusory contours compared to pictorial illusory contours and illusory contours with uncrossed horizontal disparity. Two infant-controlled habituation-dishabituation experiments explored the presence of this effect in infants 5 months of age. Experiment 1 examined whether infants are able to distinguish between a Kanizsa figure with crossed horizontal disparity and a Kanizsa figure with uncrossed horizontal disparity. Experiment 2 tested infants for their ability to differentiate between a Kanizsa figure with crossed horizontal disparity and a two-dimensional Kanizsa figure. The results provided evidence that the participants perceived the two- and the three-dimensional illusory Kanizsa contour, the illusory effect in which was strengthened by the addition of crossed horizontal disparity.
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