Infants' perception of depth from cast shadows

Perception & Psychophysics
Albert Yonas, Carl E Granrud

Abstract

Five- and 7-month-old infants viewed displays in which cast shadows provided information that two objects were at different distances. The 7-month-olds reached preferentially for the apparently nearer object under monocular-viewing conditions but exhibited no reaching preference under binocular-viewing conditions. These results indicate that 7-month-old infants perceive depth on the basis of cast shadows. The 5-month-olds did not reach preferentially for the apparently nearer object and, therefore, exhibited no evidence of sensitivity to cast shadows as depth information. In a second experiment, 5-month-olds reached preferentially for the nearer of two objects that were similar to those used in the first experiment but were positioned at different distances from the infant. This result indicated that 5-month-olds have the motor skills and motivation necessary to exhibit a reaching preference under the conditions of this study. The results are consistent with the hypothesis that depth perception based on cast shadows first appears between 5 and 7 months of age.

References

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Citations

Jul 11, 2013·PloS One·Jiale YangMasami K Yamaguchi
Nov 13, 2012·Attention, Perception & Psychophysics·Michael Kavšek, Carl E Granrud
Feb 25, 2014·Infant Behavior & Development·Rebecca J Woods, Jena Schuler
Sep 7, 2011·Infant Behavior & Development·Michael KavšekCarl E Granrud
Mar 31, 2009·Infant Behavior & Development·Michael KavsekAlbert Yonas
Nov 29, 2008·Journal of Experimental Child Psychology·Sarah M Shuwairi
Jun 5, 2015·Frontiers in Psychology·Francesco Pavani, Giovanni Galfano
Aug 16, 2014·Consciousness and Cognition·Francesco PavaniGiovanni Galfano
May 6, 2008·Vision Research·Tomoko ImuraAkihiro Yagi
May 7, 2016·Attention, Perception & Psychophysics·Kazuki SatoMasami K Yamaguchi
Mar 16, 2017·PloS One·Kazuki SatoMasami K Yamaguchi
Jan 1, 2011·Perception·Jiale YangIsamu Motoyoshi
Nov 1, 2010·Infancy : the Official Journal of the International Society on Infant Studies·Sarah M ShuwairiScott P Johnson
Jan 1, 2010·Infancy : the Official Journal of the International Society on Infant Studies·Laura HemkerMichael Kavšek
Nov 13, 2020·Infancy : the Official Journal of the International Society on Infant Studies·Rebecca J WoodsShea M Lammers

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