The evidence on changing nutrition-related social norms through the diffusion of information is limited. A recent study in Bangladesh found that nonparticipant neighbors of households that participated in a nutrition education intervention demonstrated better IYCF knowledge and practices than nonparticipant neighbors of households that received cash or food alone, which may be caused by spillover effects frominformal mother-to-mother interactions and from community meetings in which influential community members exchange information (15). In Burkina Faso, the size of the household’s social network and the strength of the household’s influence within its network had major effects on the mother’s knowledge about both breastfeeding and complementary feeding (i.e., appropriate age of introduction of foods and feeding vitaminA–rich foods)