Apes know that hidden objects can a V ect the orientation of other objects

@inproceedings{Call2006ApesKT,
  title={Apes know that hidden objects can a V ect the orientation of other objects},
  author={Josep Call},
  year={2006}
}
Four bonobos, seven gorillas, and six orangutans were presented with two small rectangular boards on a platform. One of the boards had a piece of food under it so that it acquired an inclined orientation whereas the other remained Xat on the platform. Subjects preferentially selected the inclined board. In another experiment, subjects were initially… CONTINUE READING