The gigantic neon smiley face, known as the Feel-o-Meter or Public Face, displayed the mood of the city in real time. Hooked up to a sophisticated software system first developed in 2007 by the Fraunhofer Institut that analyzed the facial expression of random city-goers, it fed the data to the smiley. The smiley then subsequently shifted its expression in real time from happy to sad or neutral depending on the overall emotional state of the people.
Tags: art, Psychology
