Via boingboing.net:
to portray the sense of conscious emotion … Takayuki Todo made a small plastic head with simplified static facial features … it can only tilt and turn its head, roll its eyes, and move its eyebrows.
It’s surprising that it works well with such simply elements. It used to be a thing at the MIT Media Lab to exploit human perception and psychology to make something seem more human that it was (i’m thinking of the “Conversational Desktop” Chris Schmandt, and Barry Arons worked on, cf.: “paralinguals”).https://monoskop.org/images/4/47/Brand_Stewart_The_Media_Lab.pdf