Via Christian Science Monitor:
Bartneck found a greater variety in the facial expressions of Lego figures after 1989. He and his colleagues separated the expressions into six general categories: disdain, confidence, concern, fear, happiness, and anger.
Over time, the authors observed a trend: The proportion of happy faces decreased, while the proportion of angry faces increased. Their study will be presented at the First International Conference on Human-Agent Interaction in Sapporo, Japan, in August.
This reflects the next frontier of robotics: infusing our machines with personality.
