In this section research supporting the importance of each subdomain is presented in turn although intersections between the domains are highlighted. It is expressed in the units of standard deviations where an effect of 0.1 is relatively weak, one of 0.40 is moderately strong, and an effect of 0.70 is strong. Family structure (e.g. parents’ marital status, presence of extended family in the home, number of children) contributes to early learning in myriad ways. For instance, the presence of multiple adults in the household who can provide care for young children may mean that children have more opportunities to engage wdth an adult in a range of stimulating activities.