| http://www.w3.org/ns/prov#value | - ial expressions to interpret others' actions | journal = [[British Journal of Developmental Psychology]] | volume = 24 | pages = 753???760 | year = 2010 | doi = 10.1348/026151005X70319 | issue = 4 }}</ref> Interest in the social world is increased by interaction with the physical environment.
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