Young infants have an impressive knowledge of material objects. They appreciate that distinct objects cannot occupy the same space at the same time, are internally cohesive units that maintain their boundaries, and exist continuously in space and time. We report a surprising limit to this body of understanding: Although 8-month-olds responded to the “magical” disappearance of an object as an unexpected event, they did not so respond to a magical appearance. These results suggest that infants' understanding of objects differs from adult cognition in important respects. We discuss four possible ways in which this finding can be reconciled with evidence that infants appreciate the spatiotemporal continuity of objects.
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References
1.
BaillargeonR. (1986). Representing the existence and the location of hidden objects: Object permanence in 6- and 8-month-olds. Cognition, 23, 21–41.
2.
BaillargeonR. (1987). Object permanence in 3.5- and 4.5-month-old infants. Developmental Psychology, 23, 655–664.
3.
BaillargeonR. (1993). The object concept revisited: New directions in the investigation of infants' physical knowledge. In GranrudC., (Ed.), Carnegie-Mellon Symposia on Cognition: Vol. 23. Visual perception and cognition in infancy (pp. 265–315). Hillsdale, NJ: Erlbaum.
4.
BaillargeonR. (1994). Physical reasoning in young infants: Seeking explanations for impossible events. British Journal of Developmental Psychology, 12, 9–33.
5.
BaillargeonR. (1995). A model of physical reasoning in infancy. In Rovee-CollierC.LipsittL.P., (Eds.), Advances in infancy research (Vol. 9, pp. 305–371). Norwood, NJ: Ablex.
6.
BaillargeonR.SpelkeE.S.WassermanS. (1985). Object permanence in 5-month-old infants. Cognition, 20, 191–208.
7.
BaylisG.DriverJ. (1993). Visual attention and objects: Evidence for hierarchical coding of location. Journal of Experimental Psychology: Human Perception and Performance, 19, 451–470.
8.
CareyS.SpelkeE.S. (1994). Domain specific knowledge and conceptual change. In HirschfeldL.A.GelmanS.A., (Eds.), Mapping the mind: Domain specificity in cognition and culture (pp. 169–200). Cambridge, England: Cambridge University Press.
9.
ChiangW.-C.WynnK. (1997, April). Infants track and reason about collections differently from individual objects. Poster presented at the biennial meeting of the Society for Research in Child Development, Washington, DC.
10.
GallistelC.R. (1990). The organization of learning. Cambridge, MA: MIT Press.
11.
GallistelC.R.GelmanR. (1992). Preverbal and verbal counting and computation. Cognition, 44, 43–74.
KoechlinE.DehaeneS.MehlerJ. (1998). Numerical transformations in five-month-old human infants. Mathematical Cognition, 3, 89–104.
14.
KotovskyL.MangioneC.BaillargeonR. (1995). Infants' responses to impenetrability violations. Unpublished manuscript, University of Illinois, Urbana-Champaign.
15.
LeslieA.M. (1991, April). Infants' understanding of invisible displacement. Paper presented at the biennial meeting of the Society for Research in Child Development, Seattle, WA.
16.
LeslieA.M.XuF.TremouletP.D.SchollB.J. (1998). Indexing and the object concept: Developing ‘what’ and ‘where’ systems. Trends in Cognitive Sciences, 2, 10–18.
17.
MeckW.H.ChurchR.M. (1983). A mode control model of counting and timing processes. Journal of Experimental Psychology: Animal Behavior Processes, 9, 320–334.
18.
MooreD.S. (1997, April). Infant mathematical skills? A conceptual replication and consideration of interpretation. Poster presented at the biennial meeting of the Society for Research in Child Development, Washington, DC.
19.
PiagetJ. (1954). The construction of reality in the child (CookM., Trans.). New York: Basic Books. (Original work published 1937)
20.
SimonT.J. (1997). Reconceptualizing the origins of numerical knowledge: A “non-numerical” account. Cognitive Development, 12, 349–372.
21.
SimonT.J.HesposS.J.RochatP. (1995). Do infants understand simple arithmetic? A replication of Wynn (1992). Cognitive Development, 10, 253–269.
22.
SpelkeE.S. (1988). Where perceiving ends and thinking begins: The apprehension of objects in infancy. In YonasA., (Ed.), Minnesota Symposium on Child Psychology: Vol. 20. Perceptual development in infancy (pp. 191–234). Hillsdale, NJ: Erlbaum.
23.
SpelkeE.S. (1991). Physical knowledge in infancy: Reflections on Piaget's theory. In CareyS.GelmanR., (Eds.), The epigenesis of mind: Essays on biology and cognition (pp. 133–169). Hillsdale, NJ: Erlbaum.
24.
SpelkeE.S. (1994). Initial knowledge: Six suggestions. Cognition, 46, 29–56.
25.
SpelkeE.S.BreinlingerK.MacomberJ.JacobsonK. (1992). Origins of knowledge. Psychological Review, 99, 605–632.
26.
SpelkeE.S.KestenbaumR. (1986). Les origines du concept d'objet. Psychologie française, 31, 67–72.
27.
TrickL.M.PylyshynZ.W. (1994). Why are small and large numbers enumerated differently? A limited capacity preattentive stage in vision. Psychological Review, 101, 80–102.
28.
UllerM.C.CareyS.Huntley-FennerG.N.KlattL. (1994, June). The representations underlying infant addition. Poster presented at the 9th International Conference on Infant Studies, Paris.
29.
WynnK. (1990). Development of counting and the concept of number. Unpublished doctoral dissertation, Massachusetts Institute of Technology, Cambridge, MA.
30.
WynnK. (1992). Addition and subtraction by human infants. Nature, 58, 749–750.
31.
WynnK. (1995a). Infants possess a system of numerical knowledge. Current Directions in Psychological Science, 4, 172–177.
32.
WynnK. (1995b). Origins of numerical knowledge. Mathematical Cognition, 1, 35–60.
33.
XuF.CareyS. (1996). Infant metaphysics: The case of numerical identity. Cognitive Psychology, 30, 111–153.
