figure 14.20 Good dog, bad dog In research by Hamlin and Wynn (2011), infants watched a puppet show in which a dog either helped another animal open a box (left photo) or interfered with an animal’s attempt to open a box by jumping up and landing on the box’s lid, slamming it closed (right photo). After seeing the show, children liked the helpful dog more than the other dog. This means that the infants could tell the difference between good and bad social behavior—