“…Hereby, it is extremely hard for robot designers to mimic human behaviour successfully and the robots mimicking human behaviour will never be perfect “humans”. This can lead to mismatches between the appearance and the behaviour, which means that the users' prior - often unrealistic – expectations, mostly based on the appearance, will be violated resulting in a feeling of unease [21] , [24] , [25] . This is the well-known phenomenon of the “uncanny valley” [26] , that is, agents which are very but not totally similar to humans, induce aversion in people.…”