Using puppets, Temple psychology researcher Neha Mahajan studied the reactions of eight-month-old babies to different scenarios. When puppets acted mean, and another puppet punished them for their actions, the babies flocked to the enforcer as their favorite toy. "Babies seem to have more nuanced views of morality and reciprocity than we had previously thought, and from a very young age they can conduct these complex social evaluations," said Mahajan.