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Chimps Revise Beliefs Like Children, Study Finds
Researchers found chimpanzees revised beliefs based on evidence reliability in 80% of tests, suggesting rational thought processes similar to young children.
- On October 30, a new study in Science found that chimpanzees can rationally revise their beliefs when presented with new information, led by Emily M. Sanford, Jan M. Engelmann, and Hanna Schleihauf.
- At Ngamba Island Chimpanzee Sanctuary in Uganda, researchers used two-box tasks to test belief revision by giving chimps an initial hint and later stronger or conflicting clues.
- 20 chimpanzees completed five experiments and followed evidence above chance in about 80 percent of cases, with computational models showing their choices matched rational belief revision and ruled out recency bias.
- Sanford says the results may reshape how scientists think about learning, child development and AI, as her team collects data from two- to four-year-olds to compare belief revision with chimpanzees.
- Engelmann frames rationality as a continuum and the team plans to extend tasks to other primate species, while some experts caution assessing internal beliefs from behavior is difficult.
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Total News Sources24
Leaning Left5Leaning Right1Center11Last UpdatedBias Distribution65% Center
Bias Distribution
- 65% of the sources are Center
65% Center
L 29%
C 65%
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