Do African Grey Parrots (Psittacus erithacus) Know What a Human Experimenter Does and Does Not See?

Perspective-taking is a cognitive ability that can be useful to access information during social interactions. This ability is extensively exploited in humans, and some evidence of it has been found in other mammals and some bird species. Perspective-taking requires individuals to be sensitive to the attentional state of others. In this experiment, three hand-reared grey […]