http://www.nature.com/ncomms/2016/160202/ncomms10506/pdf/ncomms10506.pdf
A brilliantly inventive experimental protocol to try and establish whether or not ravens actually have a "theory of mind" by Tomas Bugnyar and colleagues. Will they change their food caching behaviour without seeing another raven witnessing them but on the suspicion that another raven might be in the vicinity (they can hear a raven call) and might be able to overlook (they understand that a peep hole in the wall of their enclosure could allow another individual to peep.) Bugbear says that by these criteria ravens do have a "theory of mind". They can imagine a situation in which another raven could see what they are doing and change behaviour accordingly.
A brilliantly inventive experimental protocol to try and establish whether or not ravens actually have a "theory of mind" by Tomas Bugnyar and colleagues. Will they change their food caching behaviour without seeing another raven witnessing them but on the suspicion that another raven might be in the vicinity (they can hear a raven call) and might be able to overlook (they understand that a peep hole in the wall of their enclosure could allow another individual to peep.) Bugbear says that by these criteria ravens do have a "theory of mind". They can imagine a situation in which another raven could see what they are doing and change behaviour accordingly.