Level 1 perspective-taking at 24 months of age

@article{Moll2006Level1P,
  title={Level 1 perspective-taking at 24 months of age},
  author={Henrike Moll and Michael Tomasello},
  journal={British Journal of Development Psychology},
  year={2006},
  volume={24},
  pages={603-613}
}
The current study sought to determine the age at which children first engage in Level 1 visual perspective-taking, in which they understand that the content of what another person sees in a situation may sometimes differ from what they see. An adult entered the room searching for an object. One candidate object was out in the open, whereas another was visible for the child but behind an occluder from the adult's perspective. When asked to help the adult find the sought-for object, 24-month-old… 

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