Journal
CHILD DEVELOPMENT
Volume 80, Issue 4, Pages 1172-1196Publisher
WILEY
DOI: 10.1111/j.1467-8624.2009.01324.x
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Funding
- NICHD NIH HHS [HD-021104, R01 HD021104, R01 HD021104-26] Funding Source: Medline
- NIMH NIH HHS [1 T32MH1819990] Funding Source: Medline
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Recent research has shown that infants as young as 13 months can attribute false beliefs to agents, suggesting that the psychological-reasoning subsystem necessary for attributing reality-incongruent informational states (Subsystem-2, SS2) is operational in infancy. The present research asked whether 18-month-olds' false-belief reasoning extends to false beliefs about object identity. Infants watched events involving an agent and 2 toy penguins; 1 penguin could be disassembled (2-piece penguin) and 1 could not (1-piece penguin). Infants realized that outdated contextual information could lead the agent to falsely believe she was facing the 1-piece rather than the 2-piece penguin, suggesting that 18-month-olds can attribute false beliefs about the identity of objects and providing new evidence for SS2 reasoning in the 2nd year of life.
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