A new study in the journal Current Biology found children in religious households are significantly less generous than their non-religious peers.
At the same time, religious parents were more likely than non-religious ones to consider their children empathetic and sensitive to the plight of others.
It was the children in non-religious homes most likely to be generous toward a stranger. The longer a child had lived in a religious home, the stingier he was compared to his secular peers.
Researchers also measured how children perceived interpersonal harm and what degree of punishment they thought was appropriate. Religious children judged others' actions as meaner and more deserving of punishment than kids in secular homes.
The study concluded that in this way religious children tend to come across as more judgmental, while also being less altruistic.