To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Illustration of the visual stimuli used in the experiments. Reach and speed of judgment propagation in the laboratory Mehdi Moussaïd, Stefan M. Herzog, Juliane E. Kämmer, and Ralph Hertwig PNAS. 2017. DOI: 10.1073/pnas.1611998114 Download Original Video Browse All Videos »