Harvard study shows parrots can pass classic test of intelligence
Usually, calling someone a bird-brain is meant as an insult, but an African grey parrot named Griffin is rewriting the rules when it comes to avian intelligence. A new study shows the African grey can perform some cognitive tasks at levels beyond that 5-year-old humans. The results not only suggest that humans aren’t the only species capable of making complex inferences, but also point to flaws in a widely used test of animal intelligence. The study is described in a November paper published online in Behaviour. The paper arose from a collaboration among cognitive psychologists Irene Pepperberg, a research associate in Harvard’s Psychology Department; Francesca Cornero ’19; Suzanne Gray A.L.B. ’15, now the manager of the Alex Foundation at the Pepperberg Lab; and developmental psychologists Susan Carey, the Henry A. Morss Jr. and Elisabeth W. Morss Professor of Psychology, and Shilpa Mody, Ph.D. ’16. The classic study uses a two-cup test. A reward...