Children who had previously received rewards helped the experimenter significantly less often than either the group that received only praise or the group that received no praise.
As a Muslim parent and a Sunday school teacher, I think that we might need to examine our incentives. The study didn’t look at providing regular incentives but rather one time incentives. What is nice is that our faith has built in true incentives: rewards from Allah for good deeds. So we might need to provide good words and remind them of their true existing incentives.