This means that the human can take advantage of some social
cues that the robot could not, and could subsequently be more
socially adaptive (for example, in mutual gaze) than the robot,
which may account for some of the learning differences. A non-
expert human was used due to the tightly specified learning
content, but an expert tutor may have used different social
behaviour, potentially leading to more learning. It remains to
be seen if the robot could close the gap in learning outcomes
with improved social sensitivity and behaviour.