Figure 1. Selected frames from familiarization events shown to infants in Experiments 1 to 3.

Each familiarization event started with the two stars present in the upper part of the screen. A donor entered with two strawberries and gave them to the stars. The donor performed either an equal distribution (the fair donor), giving one strawberry to each star, or an unequal distribution (the unfair donor), giving both strawberries to the same star. At the end of the distribution event the donor left the screen.