By age 4, human children met emergence criteria for all 14 tested cognitive tasks, while chimpanzees and bonobos met criteria for only 8 of 14 tasks, and intention-emulation and social learning never emerged in chimpanzees and bonobos by age 8 in a longitudinal study.
Sources
- Comparative Cognitive Development (dash.harvard.edu)
- https://onlinelibrary.wiley.com/doi/10.1002/dev.21125 (onlinelibrary.wiley.com)
- https://scholars.duke.edu/publication/954506 (scholars.duke.edu)
- https://sites.duke.edu/tomasellolabduke/files/2016/09/Wobber_et_al_2014.pdf (sites.duke.edu)
- https://evolutionaryanthropology.duke.edu/sites/evolutionaryanthropology.duke.edu/files/site-images/differences-in-the-early-cognitive-development-of-children-and-great-apes.original.pdf (evolutionaryanthropology.duke.edu)
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