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Published on: May 15, 2019
Infants' sensitivity to pictorial depth cues: a review and meta-analysis of looking studies
Michael Kavšek1, Albert Yonas, Carl E Granrud
1University of Bonn, Institute for Psychology, Department of Developmental and Educational Psychology, Kaiser-Karl-Ring 9, 53111 Bonn, Germany. kavsek@uni-bonn.de
Insights
Infants develop sensitivity to pictorial depth cues gradually. While some studies show responsiveness at 3-5 months, robust 3D information extraction emerges around 6 months, indicating developmental progress.
Area of Science:
- Developmental Psychology
- Infant Perception
- Visual Neuroscience
Background:
- Infant sensitivity to pictorial depth cues is crucial for understanding 3D environments.
- Previous research presents conflicting findings regarding the age of emergence for this ability.
Purpose of the Study:
- To review habituation-dishabituation and preferential-looking studies on infant sensitivity to pictorial depth cues.
- To reconcile divergent findings concerning the age at which infants extract 3D information from images.
Main Methods:
- Analysis of studies using habituation-dishabituation paradigms.
- Review of preferential-looking studies assessing infant responses to pictorial depth cues.
- Comparison of studies differentiating between low-level stimulus features and genuine depth cue perception.
Main Results:
- Some studies indicate responsiveness to pictorial depth cues in infants aged 3-5 months.
- Other studies, controlling for low-level features, demonstrate sensitivity to pictorial depth information in infants 6 months and older.
- Divergent findings suggest significant developmental progression in infant depth cue sensitivity.
Conclusions:
- Infant ability to perceive spatial layout from pictorial cues develops substantially in the first six months of life.
- Robust extraction of 3D information from pictorial cues appears to emerge around 6 months of age.
- Developmental changes in visual processing likely explain the observed age-related differences in sensitivity.
Abstract:
This paper reviews habituation-dishabituation and preferential-looking studies on the emergence of sensitivity to pictorial depth cues in infancy. This research can be subdivided into two groups. While one group of studies has established responsiveness to pictorial depth cues at 3-5 months of age, the other has found that the ability to extract pictorial 3D information emerges at about 6 months. In the former, young infants were tested for their ability to distinguish between displays that differ in spatial information provided by pictorial depth cues. The results of these studies might demonstrate that 3-5-month-old infants perceive spatial layout from pictorial cues. It is possible, however, that the infants in these studies responded primarily to low-level, two-dimensional stimulus differences. In contrast, the second group of studies controlled for the potential influence of lower-level stimulus features on the infants' experimental performance and more unambiguously demonstrated sensitivity to pictorial depth information in infants 6 months of age and older. In sum, the divergent findings of studies in this area may be resolved by assuming substantial developmental progress in infant sensitivity to pictorial depth cues during the first months of life.
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