MERTZ is an active vision head robot for exploring social learning developed by lijin aryananda and
jeff weber at the MIT media lab. this robot recognizes faces and facial expressions and can even
understand speech, even repeating it back to the speaker. the robot was intended to learn from situations,
absorbing information and reacting appropriately. the robot also keeps a database of facial information
so that it could identify multiple people interacting with it at the same time. MERTZ also learns to
understand emotions by the way they modify a user’s facial expression. MERTZ can also empathize
by adjusting its expression through its modulated eyebrows and lips.

http://people.csail.mit.edu/lijin/mertz.html