In a food-sharing experiment, chimpanzee sharing behavior declined from an average of 7.12 out of 9 trials among juveniles to 4.43 among adults.
Notes on verification
Confirmed by peer-reviewed Current Biology study and corroborating academic/news sources on bonobo/chimpanzee social development research. [tier=gold indep_score=1.0 clusters=3 claim_tier=notable]
Sources
- Comparative Cognitive Development (seed:psychology_and_neuroscience)
- https://www.cell.com/current-biology/fulltext/S0960-9822(09)02141-1 (corroboration)
- https://evolutionaryanthropology.duke.edu/sites/evolutionaryanthropology.duke.edu/files/site-images/bonobos-exhibit-delayed-development-of-social-behavior-and.original.pdf (corroboration)
- https://pubmed.ncbi.nlm.nih.gov/20116251/ (corroboration)