Já se sabia da capacidade dos macacos fazem inferências, mas agora uma pesquisa mostrou que um tipo de papagaio da Nova Zelândia, Kea, também possui esta capacidade
The researchers taught the birds that a black token always led to a tasty food pellet, whereas an orange one never did. When the scientists placed two transparent jars containing a mix of tokens next to the keas and removed a token with a closed hand, the birds were more likely to pick hands dipped into jars that contained more black than orange tokens, even if the ratio was as close as 63 to 57.
That experiment combined with other tests “provide conclusive evidence” that keas are capable of “true statistical inference,” the scientists report in today’s issue of Nature Communications.
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