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Infants' metaphysics: the case of numerical identity
1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139, USA. fei@psyche.mit.edu
Cognitive Psychology
|April 1, 1996
Summary
Young infants first understand objects using general physical properties. They later develop specific object concepts, like
Area of Science:
- Cognitive Development
- Developmental Psychology
- Object Perception
Background:
- Adults use sortal concepts for object individuation and identity, with general (bounded physical object) and specific (e.g., dog, car) levels.
- The Object-first Hypothesis suggests infants initially represent only general objects, developing specific sortals later.
Purpose of the Study:
- To investigate whether young infants use spatiotemporal or property information for object individuation.
- To provide empirical evidence for the Object-first Hypothesis regarding infant object representation.
Main Methods:
- Five studies employed the visual habituation paradigm with 10-month-old infants.
- Infants' ability to individuate objects based on spatiotemporal versus property information was assessed.
Main Results:
- Ten-month-old infants successfully used spatiotemporal information for object individuation.
- Infants at this age failed to use property/kind information for individuation.
- By 12 months, infants demonstrated success with more specific sortals.
Conclusions:
- Findings support the Object-first Hypothesis, indicating infants prioritize spatiotemporal cues for object individuation.
- Infants' object individuation capabilities evolve, progressing from general object representation to specific sortals.
- The study highlights developmental shifts in how infants establish object identity and numerical distinctness.