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A central issue within the field of object individuation concerns the kind of information that infants rely on when they succeed in individuating objects. By means of the violation-of-expectation strategy, the present study reports a comparison of 8.0- and 6.5-month-old infants' use of featural and spatiotemporal information in a new non-occlusion event-monitoring design. Using a mirror setup the memory demands were minimized, because all apparent changes in the unexpected test events took place in full view of the infants. The results indicate that the 8.0- and 6.5-month-old infants individuated objects successfully regardless of whether they were provided with featural or spatiotemporal information. The results are discussed in relation to the relevant literature.
Acknowledgments
This research was supported by a grant from the Danish Research Council for the Humanities (No. 273 – 05 – 0182) and by Aarhus University Research Foundation. The data reported here were presented in an oral presentation at Perspectives on Memory and Cognition conference in Aarhus, June 2006.
I would like to thank Allan Jones and Lone Hansen for their comments on an earlier version of the manuscript. Thanks to Perinatal Epidemiological Research Unit at Skejby Hospital for giving me access to their birth register. I would like to thank Helle M⊘ller Nielsen, Line B. Hansen, Anna I. Blond, and Heidi Gregersen for their help regarding recruiting and collecting the data. Thanks to Preben Jensen for making and maintaining the puppet theatre. Thanks to Bo Sommerlund for programming and statistical assistance. Last, but not least, I would like to thank all the infants who participated in this study, and their parents who kindly let them participate.