Related Experiment Videos
Perceptual completion of surfaces in infancy
N Termine1, T Hrynick, R Kestenbaum
1University of Pennsylvania.
Insights
Four-month-old infants perceive background surfaces as continuous when hidden. However, they do not perceive foreground surfaces as continuous when occluded, indicating context-dependent surface perception in early development.
Area of Science:
- Developmental Psychology
- Cognitive Science
- Visual Perception
Background:
- Infant visual perception is crucial for understanding cognitive development.
- Surface continuity perception is fundamental to scene understanding.
- Distinguishing figure from ground influences object perception.
Purpose of the Study:
- To investigate whether 4-month-old infants perceive occluded surfaces as continuous.
- To determine if surface continuity perception depends on whether the surface is a background or foreground element.
- To explore the role of figure-ground segregation in infant surface perception.
Main Methods:
- Two experiments utilized familiarization and habituation paradigms with partly occluded background surfaces.
- Infants were tested on their looking time towards continuous versus interrupted nonoccluded surfaces.
- A third experiment habituated infants to a partly hidden foreground surface with visible edges.
Main Results:
- Infants looked longer at interrupted surfaces compared to continuous ones, suggesting perception of background continuity.
- Infants showed no evidence of perceiving foreground surfaces as continuous behind an occluder.
- Perception of surface continuity appears dependent on the surface's role as a background.
Conclusions:
- Four-month-old infants perceive background surfaces as continuous even when partly occluded.
- Foreground surfaces are not perceived as continuous behind occluders by young infants.
- Infant surface continuity perception is influenced by figure-ground organization and scene context.
Abstract:
Two experiments provide evidence that 4-month-old infants perceive background surfaces as continuous behind occluding objects. Infants were shown a partly hidden background surface either for a brief period of familiarization (Experiment 1) or until they met a criterion of habituation (Experiment 2). The infants were then tested with nonoccluded surfaces that were either continuous or interrupted by a gap where the occluder had been. The infants in each study looked longer at the interrupted than at the continuous surface, relative to infants in baseline controls, which suggests that the partly hidden surface was perceived as continuous. Contrasting findings were obtained in a third experiment, in which infants were habituated to a partly hidden surface that stood in front of a background so that its edges were visible: Infants gave no evidence of perceiving the foreground surface as continuous behind the occluder. These experiments provide evidence that infants perceive a surface as continuous only if it serves as the background of a scene. The results are discussed in relation to figure-ground perception in pictures and surface layouts.