This is an excerpt from There Will Be Blood (Paul Thomas Anderson, 2007). 11 adult viewers were shown the video and their eye movements recorded using an Eyelink 1000 (SR Research) infra-red camera-based eyetracker. Each dot represents the center of one viewer's gaze. The size of each dot represents the length of time they have held fixation.
Notice how people are focusing on characters who aren't talking as well...really shows how important it is to give your character a thoughtful performance/keep alive even if they aren't talking.