The term uncanny valley describes the chilly sensation we feel when we see a robot that looks almost—but not quite—human. When Masahiro Mori introduced the concept, his accompanying chart showed the progression from lovable droid to horrific baby doll. We’ve provided a version of Mori’s guide here, with a few additional data points.

Images: R2-D2, C-3PO, Minaj, Olsen, Rivers, Pattinson, Colbert, Levitt: Corbis; Data, Seven of Nine: Everett; Real Doll: Getty