Fig. 1.

Participant interface for Experiment 1. Each categorization task consisted of a different set of gem classifications that were given random nonsense words. Each participant belonged to a “generation” of participants, called a “shift” in this experiment. In each generation after the first, participants could view the gem classifications made by participants in the last generation. Each participant made their own classification decisions for a gem four times after observing four pieces of non‐social evidence.